TH1 is a highly conserved but uncharacterised metazoan protein. No homologue has been identified in Caenorhabditis elegans [1]. TH1 binds specifically to A-Raf kinase [2].

1: Characterization of TH1 and CTSZ, two non-imprinted genes downstream of GNAS1 in chromosome 20q13. Bonthron DT, Hayward BE, Moran V, Strain L; Hum Genet 2000;107:165-175. PMID:11030415

2: Identification of TH1 as an interaction partner of A-Raf kinase. Yin XL, Chen S, Gu JX; Mol Cell Biochem 2002;231:69-74. PMID:11952167