>cd03234 ABCG_White The White subfamily represents ABC transporters homologous to the Drosophila white gene, which acts as a dimeric importer for eye pigment precursors. The eye pigmentation of Drosophila is developed from the synthesis and deposition in the cells of red pigments, which are synthesized from guanine, and brown pigments, which are synthesized from tryptophan. The pigment precursors are encoded by the white, brown, and scarlet genes, respectively. Evidence from genetic and biochemical studies suggest that the White and Brown proteins function as heterodimers to import guanine, while the White and Scarlet proteins function to import tryptophan. However, a recent study also suggests that White may be involved in the transport of a metabolite, such as 3-hydroxykynurenine, across intracellular membranes. Mammalian ABC transporters belonging to the White subfamily (ABCG1, ABCG5, and ABCG8) have been shown to be involved in the regulation of lipid-trafficking mechanisms in

Probab=97.78  E-value=0.00052  Score=48.40  Aligned_cols=33  Identities=33%  Similarity=0.509  Sum_probs=27.3

Q ss_pred             EEEEEEECCCCCCCCCEEEEEECCCCCCHHHHHHHHH
Q ss_conf             4434563587777664399996778440789999999
Q gi|254780750|r  635 IANDCDLSCPNDKNSGKLWLLTGPNMGGKSTFLRQNA  671 (920)
Q Consensus       635 VpNdi~l~~~~~~~~~~~~iiTGpNmgGKSt~lRqva  671 (920)
T Consensus        22 vL~~vs~~i----~~Ge~~~ilGpnGsGKSTLl~~i~   54 (226)
T cd03234          22 ILNDVSLHV----ESGQVMAILGSSGSGKTTLLDAIS   54 (226)
T ss_pred             EEECCEEEE----ECCCEEEEECCCCCHHHHHHHHHH
T ss_conf             988977899----188099999899960999999996