List of proteins associated with GO term: GO:0050919   negative chemotaxis
Protein ID
Link to complete
analysis report

Confident Level
for GO:0050919
All predicted GO Terms
psy16581 portable GO:0005737, portable, cytoplasm
GO:0021846, portable, cell proliferation in forebrain
GO:0045944, portable, positive regulation of transcription from RNA polymerase II promoter
GO:0005615, portable, extracellular space
GO:0005125, portable, cytokine activity
GO:0009986, portable, cell surface
GO:0007411, portable, axon guidance
GO:0048146, portable, positive regulation of fibroblast proliferation
GO:0030509, portable, BMP signaling pathway
GO:0045599, portable, negative regulation of fat cell differentiation
GO:0061317, portable, canonical Wnt receptor signaling pathway involved in cardiac muscle cell fate commitment
GO:0060340, portable, positive regulation of type I interferon-mediated signaling pathway
GO:0014834, portable, satellite cell maintenance involved in skeletal muscle regeneration
GO:0090068, portable, positive regulation of cell cycle process
GO:0033138, portable, positive regulation of peptidyl-serine phosphorylation
GO:0043588, portable, skin development
GO:0060599, portable, lateral sprouting involved in mammary gland duct morphogenesis
GO:0050729, portable, positive regulation of inflammatory response
GO:0090287, portable, regulation of cellular response to growth factor stimulus
GO:0014719, portable, satellite cell activation
GO:2000081, portable, positive regulation of canonical Wnt receptor signaling pathway involved in controlling type B pancreatic cell proliferation
GO:0071396, portable, cellular response to lipid
GO:0005886, portable, plasma membrane
GO:0043280, portable, positive regulation of cysteine-type endopeptidase activity involved in apoptotic process
GO:0051092, portable, positive regulation of NF-kappaB transcription factor activity
GO:0051964, portable, negative regulation of synapse assembly
GO:0035115, portable, embryonic forelimb morphogenesis
GO:0030825, portable, positive regulation of cGMP metabolic process
GO:0045892, portable, negative regulation of transcription, DNA-dependent
GO:0048806, portable, genitalia development
GO:0034613, portable, cellular protein localization
GO:0050919, portable, negative chemotaxis
GO:0042733, portable, embryonic digit morphogenesis
GO:0010977, portable, negative regulation of neuron projection development
GO:0048839, portable, inner ear development
GO:0061184, portable, positive regulation of dermatome development
GO:0060907, portable, positive regulation of macrophage cytokine production
GO:0060021, portable, palate development
GO:0050808, portable, synapse organization
GO:0014033, portable, neural crest cell differentiation
GO:0071219, portable, cellular response to molecule of bacterial origin
GO:0001947, portable, heart looping
GO:0021872, portable, forebrain generation of neurons
GO:2000484, portable, positive regulation of interleukin-8 secretion
GO:0060065, portable, uterus development
GO:0048103, portable, somatic stem cell division
GO:0035659, portable, Wnt receptor signaling pathway involved in wound healing, spreading of epidermal cells
GO:0010842, portable, retina layer formation
GO:0043627, portable, response to estrogen stimulus
GO:0001837, portable, epithelial to mesenchymal transition
GO:0042074, portable, cell migration involved in gastrulation
GO:0060744, portable, mammary gland branching involved in thelarche
GO:0031076, portable, embryonic camera-type eye development
GO:0030198, portable, extracellular matrix organization
GO:0008595, portable, anterior/posterior axis specification, embryo
GO:0060492, portable, lung induction
GO:0060638, portable, mesenchymal-epithelial cell signaling
GO:0071425, portable, hematopoietic stem cell proliferation
GO:0060061, portable, Spemann organizer formation
GO:0042476, portable, odontogenesis
GO:0060054, portable, positive regulation of epithelial cell proliferation involved in wound healing
GO:0035270, portable, endocrine system development
GO:0010595, portable, positive regulation of endothelial cell migration
GO:0043065, portable, positive regulation of apoptotic process
GO:0003700, portable, sequence-specific DNA binding transcription factor activity
GO:0043032, portable, positive regulation of macrophage activation
GO:0048843, portable, negative regulation of axon extension involved in axon guidance
GO:0043066, portable, negative regulation of apoptotic process
GO:0007257, portable, activation of JUN kinase activity
GO:0030010, portable, establishment of cell polarity
GO:0060750, portable, epithelial cell proliferation involved in mammary gland duct elongation
GO:0060993, portable, kidney morphogenesis
GO:0032148, portable, activation of protein kinase B activity
GO:0060026, portable, convergent extension
GO:0045686, portable, negative regulation of glial cell differentiation
GO:1901701, portable, cellular response to oxygen-containing compound
GO:2000049, portable, positive regulation of cell-cell adhesion mediated by cadherin
GO:0003713, portable, transcription coactivator activity
GO:0019904, portable, protein domain specific binding
GO:0044339, portable, canonical Wnt receptor signaling pathway involved in osteoblast differentiation
GO:0044332, portable, Wnt receptor signaling pathway involved in dorsal/ventral axis specification
GO:0072080, portable, nephron tubule development
GO:0051965, portable, positive regulation of synapse assembly
GO:0008584, portable, male gonad development
GO:0010387, portable, signalosome assembly
GO:0002088, portable, lens development in camera-type eye
GO:0021537, portable, telencephalon development
GO:0048562, portable, embryonic organ morphogenesis
GO:0035413, portable, positive regulation of catenin import into nucleus
GO:2000727, portable, positive regulation of cardiac muscle cell differentiation
GO:0048706, portable, embryonic skeletal system development
GO:0055008, portable, cardiac muscle tissue morphogenesis
GO:0001938, portable, positive regulation of endothelial cell proliferation
GO:0007498, portable, mesoderm development
GO:0007569, portable, cell aging
GO:0045669, portable, positive regulation of osteoblast differentiation
GO:0021707, portable, cerebellar granule cell differentiation
GO:0006464, portable, cellular protein modification process
GO:0005110, portable, frizzled-2 binding
GO:0022009, portable, central nervous system vasculogenesis
GO:0045778, portable, positive regulation of ossification
GO:0030890, portable, positive regulation of B cell proliferation
GO:0035116, portable, embryonic hindlimb morphogenesis
GO:0090190, portable, positive regulation of branching involved in ureteric bud morphogenesis
GO:0051209, portable, release of sequestered calcium ion into cytosol
GO:0005115, portable, receptor tyrosine kinase-like orphan receptor binding
GO:0010976, portable, positive regulation of neuron projection development
GO:0048565, portable, digestive tract development
GO:0060174, portable, limb bud formation
GO:0045080, portable, positive regulation of chemokine biosynthetic process
GO:0046330, portable, positive regulation of JNK cascade
GO:0010820, portable, positive regulation of T cell chemotaxis
GO:0061053, portable, somite development
GO:0003136, portable, negative regulation of heart induction by canonical Wnt receptor signaling pathway
GO:0002092, portable, positive regulation of receptor internalization
GO:0032092, portable, positive regulation of protein binding
GO:0090090, portable, negative regulation of canonical Wnt receptor signaling pathway
GO:0071560, portable, cellular response to transforming growth factor beta stimulus
GO:0008105, portable, asymmetric protein localization
GO:0072201, portable, negative regulation of mesenchymal cell proliferation
GO:0002062, portable, chondrocyte differentiation
GO:0048337, portable, positive regulation of mesodermal cell fate specification
GO:0030324, portable, lung development
GO:0002741, portable, positive regulation of cytokine secretion involved in immune response
GO:0010259, portable, multicellular organismal aging
GO:0030216, portable, keratinocyte differentiation
GO:0090037, portable, positive regulation of protein kinase C signaling cascade
GO:0048697, portable, positive regulation of collateral sprouting in absence of injury
GO:0044212, portable, transcription regulatory region DNA binding
GO:0021871, portable, forebrain regionalization
GO:0070527, portable, platelet aggregation
GO:0003209, portable, cardiac atrium morphogenesis
GO:0060324, portable, face development
GO:0048018, portable, receptor agonist activity
GO:0044338, portable, canonical Wnt receptor signaling pathway involved in mesenchymal stem cell differentiation
GO:0060711, portable, labyrinthine layer development
GO:0048730, portable, epidermis morphogenesis
GO:0021915, portable, neural tube development
GO:0045766, portable, positive regulation of angiogenesis
GO:0031133, portable, regulation of axon diameter
GO:0038030, portable, non-canonical Wnt receptor signaling pathway via MAPK cascade
GO:0001838, portable, embryonic epithelial tube formation
GO:0005578, portable, proteinaceous extracellular matrix
GO:0045732, portable, positive regulation of protein catabolic process
psy10378 portable GO:0005004, portable, GPI-linked ephrin receptor activity
GO:0030425, portable, dendrite
GO:0009897, portable, external side of plasma membrane
GO:0021766, portable, hippocampus development
GO:0045499, portable, chemorepellent activity
GO:0005005, portable, transmembrane-ephrin receptor activity
GO:0050919, portable, negative chemotaxis
GO:0044446, portable, intracellular organelle part
GO:0051960, portable, regulation of nervous system development
GO:0046777, portable, protein autophosphorylation
GO:0033628, portable, regulation of cell adhesion mediated by integrin
GO:0031952, portable, regulation of protein autophosphorylation
GO:0022407, portable, regulation of cell-cell adhesion
GO:0007569, portable, cell aging
GO:0032956, portable, regulation of actin cytoskeleton organization
GO:0048523, portable, negative regulation of cellular process
GO:0070372, portable, regulation of ERK1 and ERK2 cascade
GO:0048471, portable, perinuclear region of cytoplasm
GO:0043552, portable, positive regulation of phosphatidylinositol 3-kinase activity
GO:0045211, portable, postsynaptic membrane
GO:0032314, portable, regulation of Rac GTPase activity
GO:0031290, portable, retinal ganglion cell axon guidance
GO:0031090, portable, organelle membrane
GO:0043025, portable, neuronal cell body
GO:0046875, portable, ephrin receptor binding
GO:0005887, portable, integral to plasma membrane
GO:0008046, portable, axon guidance receptor activity
GO:0006929, portable, substrate-dependent cell migration
GO:0016322, portable, neuron remodeling
GO:0010259, portable, multicellular organismal aging
GO:0005791, portable, rough endoplasmic reticulum
GO:0018108, portable, peptidyl-tyrosine phosphorylation
GO:0030424, portable, axon
GO:0050730, portable, regulation of peptidyl-tyrosine phosphorylation
GO:0048013, portable, ephrin receptor signaling pathway
GO:0043281, portable, regulation of cysteine-type endopeptidase activity involved in apoptotic process
GO:0031594, portable, neuromuscular junction
GO:0061178, portable, regulation of insulin secretion involved in cellular response to glucose stimulus
GO:0031589, portable, cell-substrate adhesion
GO:0043410, portable, positive regulation of MAPK cascade
psy16604 portable GO:0005737, portable, cytoplasm
GO:0021846, portable, cell proliferation in forebrain
GO:0045944, portable, positive regulation of transcription from RNA polymerase II promoter
GO:0005615, portable, extracellular space
GO:0005125, portable, cytokine activity
GO:0009986, portable, cell surface
GO:0007411, portable, axon guidance
GO:0048146, portable, positive regulation of fibroblast proliferation
GO:0030509, portable, BMP signaling pathway
GO:0045599, portable, negative regulation of fat cell differentiation
GO:0061317, portable, canonical Wnt receptor signaling pathway involved in cardiac muscle cell fate commitment
GO:0060340, portable, positive regulation of type I interferon-mediated signaling pathway
GO:0014834, portable, satellite cell maintenance involved in skeletal muscle regeneration
GO:0090068, portable, positive regulation of cell cycle process
GO:0033138, portable, positive regulation of peptidyl-serine phosphorylation
GO:0043588, portable, skin development
GO:0060599, portable, lateral sprouting involved in mammary gland duct morphogenesis
GO:0050729, portable, positive regulation of inflammatory response
GO:0090287, portable, regulation of cellular response to growth factor stimulus
GO:0014719, portable, satellite cell activation
GO:2000081, portable, positive regulation of canonical Wnt receptor signaling pathway involved in controlling type B pancreatic cell proliferation
GO:0071396, portable, cellular response to lipid
GO:0005886, portable, plasma membrane
GO:0043280, portable, positive regulation of cysteine-type endopeptidase activity involved in apoptotic process
GO:0051092, portable, positive regulation of NF-kappaB transcription factor activity
GO:0051964, portable, negative regulation of synapse assembly
GO:0035115, portable, embryonic forelimb morphogenesis
GO:0030825, portable, positive regulation of cGMP metabolic process
GO:0045892, portable, negative regulation of transcription, DNA-dependent
GO:0048806, portable, genitalia development
GO:0034613, portable, cellular protein localization
GO:0050919, portable, negative chemotaxis
GO:0042733, portable, embryonic digit morphogenesis
GO:0010977, portable, negative regulation of neuron projection development
GO:0048839, portable, inner ear development
GO:0061184, portable, positive regulation of dermatome development
GO:0060907, portable, positive regulation of macrophage cytokine production
GO:0060021, portable, palate development
GO:0050808, portable, synapse organization
GO:0014033, portable, neural crest cell differentiation
GO:0071219, portable, cellular response to molecule of bacterial origin
GO:0001947, portable, heart looping
GO:0021872, portable, forebrain generation of neurons
GO:2000484, portable, positive regulation of interleukin-8 secretion
GO:0060065, portable, uterus development
GO:0048103, portable, somatic stem cell division
GO:0035659, portable, Wnt receptor signaling pathway involved in wound healing, spreading of epidermal cells
GO:0010842, portable, retina layer formation
GO:0043627, portable, response to estrogen stimulus
GO:0001837, portable, epithelial to mesenchymal transition
GO:0042074, portable, cell migration involved in gastrulation
GO:0060744, portable, mammary gland branching involved in thelarche
GO:0031076, portable, embryonic camera-type eye development
GO:0030198, portable, extracellular matrix organization
GO:0008595, portable, anterior/posterior axis specification, embryo
GO:0060492, portable, lung induction
GO:0060638, portable, mesenchymal-epithelial cell signaling
GO:0071425, portable, hematopoietic stem cell proliferation
GO:0060061, portable, Spemann organizer formation
GO:0042476, portable, odontogenesis
GO:0060054, portable, positive regulation of epithelial cell proliferation involved in wound healing
GO:0035270, portable, endocrine system development
GO:0010595, portable, positive regulation of endothelial cell migration
GO:0043065, portable, positive regulation of apoptotic process
GO:0003700, portable, sequence-specific DNA binding transcription factor activity
GO:0043032, portable, positive regulation of macrophage activation
GO:0048843, portable, negative regulation of axon extension involved in axon guidance
GO:0043066, portable, negative regulation of apoptotic process
GO:0007257, portable, activation of JUN kinase activity
GO:0030010, portable, establishment of cell polarity
GO:0060750, portable, epithelial cell proliferation involved in mammary gland duct elongation
GO:0060993, portable, kidney morphogenesis
GO:0032148, portable, activation of protein kinase B activity
GO:0060026, portable, convergent extension
GO:0045686, portable, negative regulation of glial cell differentiation
GO:1901701, portable, cellular response to oxygen-containing compound
GO:2000049, portable, positive regulation of cell-cell adhesion mediated by cadherin
GO:0003713, portable, transcription coactivator activity
GO:0019904, portable, protein domain specific binding
GO:0044339, portable, canonical Wnt receptor signaling pathway involved in osteoblast differentiation
GO:0044332, portable, Wnt receptor signaling pathway involved in dorsal/ventral axis specification
GO:0072080, portable, nephron tubule development
GO:0051965, portable, positive regulation of synapse assembly
GO:0008584, portable, male gonad development
GO:0010387, portable, signalosome assembly
GO:0002088, portable, lens development in camera-type eye
GO:0021537, portable, telencephalon development
GO:0048562, portable, embryonic organ morphogenesis
GO:0035413, portable, positive regulation of catenin import into nucleus
GO:2000727, portable, positive regulation of cardiac muscle cell differentiation
GO:0048706, portable, embryonic skeletal system development
GO:0055008, portable, cardiac muscle tissue morphogenesis
GO:0001938, portable, positive regulation of endothelial cell proliferation
GO:0007498, portable, mesoderm development
GO:0007569, portable, cell aging
GO:0045669, portable, positive regulation of osteoblast differentiation
GO:0021707, portable, cerebellar granule cell differentiation
GO:0006464, portable, cellular protein modification process
GO:0005110, portable, frizzled-2 binding
GO:0022009, portable, central nervous system vasculogenesis
GO:0045778, portable, positive regulation of ossification
GO:0030890, portable, positive regulation of B cell proliferation
GO:0035116, portable, embryonic hindlimb morphogenesis
GO:0090190, portable, positive regulation of branching involved in ureteric bud morphogenesis
GO:0051209, portable, release of sequestered calcium ion into cytosol
GO:0005115, portable, receptor tyrosine kinase-like orphan receptor binding
GO:0010976, portable, positive regulation of neuron projection development
GO:0048565, portable, digestive tract development
GO:0060174, portable, limb bud formation
GO:0045080, portable, positive regulation of chemokine biosynthetic process
GO:0046330, portable, positive regulation of JNK cascade
GO:0010820, portable, positive regulation of T cell chemotaxis
GO:0061053, portable, somite development
GO:0003136, portable, negative regulation of heart induction by canonical Wnt receptor signaling pathway
GO:0002092, portable, positive regulation of receptor internalization
GO:0032092, portable, positive regulation of protein binding
GO:0090090, portable, negative regulation of canonical Wnt receptor signaling pathway
GO:0071560, portable, cellular response to transforming growth factor beta stimulus
GO:0008105, portable, asymmetric protein localization
GO:0072201, portable, negative regulation of mesenchymal cell proliferation
GO:0002062, portable, chondrocyte differentiation
GO:0048337, portable, positive regulation of mesodermal cell fate specification
GO:0030324, portable, lung development
GO:0002741, portable, positive regulation of cytokine secretion involved in immune response
GO:0010259, portable, multicellular organismal aging
GO:0030216, portable, keratinocyte differentiation
GO:0090037, portable, positive regulation of protein kinase C signaling cascade
GO:0048697, portable, positive regulation of collateral sprouting in absence of injury
GO:0044212, portable, transcription regulatory region DNA binding
GO:0021871, portable, forebrain regionalization
GO:0070527, portable, platelet aggregation
GO:0003209, portable, cardiac atrium morphogenesis
GO:0060324, portable, face development
GO:0048018, portable, receptor agonist activity
GO:0044338, portable, canonical Wnt receptor signaling pathway involved in mesenchymal stem cell differentiation
GO:0060711, portable, labyrinthine layer development
GO:0048730, portable, epidermis morphogenesis
GO:0021915, portable, neural tube development
GO:0045766, portable, positive regulation of angiogenesis
GO:0031133, portable, regulation of axon diameter
GO:0038030, portable, non-canonical Wnt receptor signaling pathway via MAPK cascade
GO:0001838, portable, embryonic epithelial tube formation
GO:0005578, portable, proteinaceous extracellular matrix
GO:0045732, portable, positive regulation of protein catabolic process
psy17097 portable GO:0005004, portable, GPI-linked ephrin receptor activity
GO:0007569, portable, cell aging
GO:0005887, portable, integral to plasma membrane
GO:0010259, portable, multicellular organismal aging
GO:0048013, portable, ephrin receptor signaling pathway
GO:0009897, portable, external side of plasma membrane
GO:0021766, portable, hippocampus development
GO:0007422, portable, peripheral nervous system development
GO:0001763, portable, morphogenesis of a branching structure
GO:0032863, portable, activation of Rac GTPase activity
GO:0043204, portable, perikaryon
GO:0030316, portable, osteoclast differentiation
GO:0016319, portable, mushroom body development
GO:0051898, portable, negative regulation of protein kinase B signaling cascade
GO:0045499, portable, chemorepellent activity
GO:0048646, portable, anatomical structure formation involved in morphogenesis
GO:0005005, portable, transmembrane-ephrin receptor activity
GO:0050919, portable, negative chemotaxis
GO:2001108, portable, positive regulation of Rho guanyl-nucleotide exchange factor activity
GO:0043535, portable, regulation of blood vessel endothelial cell migration
GO:0070309, portable, lens fiber cell morphogenesis
GO:0051093, portable, negative regulation of developmental process
GO:0014068, portable, positive regulation of phosphatidylinositol 3-kinase cascade
GO:0019933, portable, cAMP-mediated signaling
GO:0046777, portable, protein autophosphorylation
GO:0010591, portable, regulation of lamellipodium assembly
GO:0035011, portable, melanotic encapsulation of foreign target
GO:0033628, portable, regulation of cell adhesion mediated by integrin
GO:0031952, portable, regulation of protein autophosphorylation
GO:0022407, portable, regulation of cell-cell adhesion
GO:0065008, portable, regulation of biological quality
GO:0060997, portable, dendritic spine morphogenesis
GO:0014069, portable, postsynaptic density
GO:0030175, portable, filopodium
GO:0007155, portable, cell adhesion
GO:0070848, portable, response to growth factor stimulus
GO:0031346, portable, positive regulation of cell projection organization
GO:0044295, portable, axonal growth cone
GO:0045765, portable, regulation of angiogenesis
GO:0032956, portable, regulation of actin cytoskeleton organization
GO:0060326, portable, cell chemotaxis
GO:0043679, portable, axon terminus
GO:0070372, portable, regulation of ERK1 and ERK2 cascade
GO:0048471, portable, perinuclear region of cytoplasm
GO:0043552, portable, positive regulation of phosphatidylinositol 3-kinase activity
GO:0031901, portable, early endosome membrane
GO:0005741, portable, mitochondrial outer membrane
GO:0050770, portable, regulation of axonogenesis
GO:0045211, portable, postsynaptic membrane
GO:0032314, portable, regulation of Rac GTPase activity
GO:0031290, portable, retinal ganglion cell axon guidance
GO:0043491, portable, protein kinase B signaling cascade
GO:0051129, portable, negative regulation of cellular component organization
GO:0046875, portable, ephrin receptor binding
GO:0005925, portable, focal adhesion
GO:0031256, portable, leading edge membrane
GO:0008046, portable, axon guidance receptor activity
GO:0048514, portable, blood vessel morphogenesis
GO:0006929, portable, substrate-dependent cell migration
GO:0016322, portable, neuron remodeling
GO:0030216, portable, keratinocyte differentiation
GO:0005791, portable, rough endoplasmic reticulum
GO:0018108, portable, peptidyl-tyrosine phosphorylation
GO:0043507, portable, positive regulation of JUN kinase activity
GO:0050730, portable, regulation of peptidyl-tyrosine phosphorylation
GO:0051893, portable, regulation of focal adhesion assembly
GO:0090004, portable, positive regulation of establishment of protein localization to plasma membrane
GO:0043281, portable, regulation of cysteine-type endopeptidase activity involved in apoptotic process
GO:0070507, portable, regulation of microtubule cytoskeleton organization
GO:0031594, portable, neuromuscular junction
GO:0097161, portable, DH domain binding
GO:0061178, portable, regulation of insulin secretion involved in cellular response to glucose stimulus
GO:0005794, portable, Golgi apparatus
psy1789 portable GO:0017147, portable, Wnt-protein binding
GO:0043410, portable, positive regulation of MAPK cascade
GO:0042813, portable, Wnt-activated receptor activity
GO:0071900, portable, regulation of protein serine/threonine kinase activity
GO:0043005, portable, neuron projection
GO:0016055, portable, Wnt receptor signaling pathway
GO:0048009, portable, insulin-like growth factor receptor signaling pathway
GO:0005109, portable, frizzled binding
GO:0005911, portable, cell-cell junction
GO:0050919, portable, negative chemotaxis
GO:0044428, portable, nuclear part
GO:0046777, portable, protein autophosphorylation
GO:0005615, portable, extracellular space
GO:0071310, portable, cellular response to organic substance
GO:0048843, portable, negative regulation of axon extension involved in axon guidance
GO:0046331, portable, lateral inhibition
GO:1901701, portable, cellular response to oxygen-containing compound
GO:0042981, portable, regulation of apoptotic process
GO:0005524, portable, ATP binding
GO:0051259, portable, protein oligomerization
GO:0004714, portable, transmembrane receptor protein tyrosine kinase activity
GO:0022038, portable, corpus callosum development
GO:0005856, portable, cytoskeleton
GO:0071679, portable, commissural neuron axon guidance
GO:0045202, portable, synapse
GO:0048705, portable, skeletal system morphogenesis
GO:0007435, portable, salivary gland morphogenesis
GO:0044444, portable, cytoplasmic part
GO:0032403, portable, protein complex binding
GO:0019838, portable, growth factor binding
GO:0005887, portable, integral to plasma membrane
GO:0016204, portable, determination of muscle attachment site
GO:0018108, portable, peptidyl-tyrosine phosphorylation
GO:0045860, portable, positive regulation of protein kinase activity