This is the C-terminal domain of Cancer susceptibility candidate 1 (Casc1) which has many SNPs associated with cancer susceptibility [1,2].

1: A V141L polymorphism of the human LRMP gene is associated with survival of lung cancer patients. Manenti G, Galbiati F, Pettinicchio A, Spinola M, Piconese S, Leoni VP, Conti B, Ravagnani F, Incarbone M, Pastorino U, Dragani TA; Carcinogenesis. 2006;27:1386-1390. PMID:16410263

2: Positional cloning of the major quantitative trait locus underlying lung tumor susceptibility in mice. Zhang Z, Futamura M, Vikis HG, Wang M, Li J, Wang Y, Guan KL, You M; Proc Natl Acad Sci U S A. 2003;100:12642-12647. PMID:14583591