This family includes Cat eye syndrome critical region protein 6, a protein which has been identified in a screen for candidate genes for the developmental disorder Cat Eye Syndrome (CES) [1]. It also includes the TMEM121 transmembrane proteins. The function of this family is unknown.

1: Analysis of the cat eye syndrome critical region in humans and the region of conserved synteny in mice: a search for candidate genes at or near the human chromosome 22 pericentromere. Footz TK, Brinkman-Mills P, Banting GS, Maier SA, Riazi MA, Bridgland L, Hu S, Birren B, Minoshima S, Shimizu N, Pan H, Nguyen T, Fang F, Fu Y, Ray L, Wu H, Shaull S, Phan S, Yao Z, Chen F, Huan A, Hu P, Wang Q, Loh P, Qi S, Roe BA, McDermid HE; Genome Res. 2001;11:1053-1070. PMID:11381032