This protein is part of a family found in eukaryotes. It is 137 amino acids long in protein sequence length and mass is approximately 15.7 kDa. The protein is present in the normal lung epithelium, but absent or downregulated in most primary non-small lung cancers. The gene is known as Low in Lung Cancer 1 (LLC1). This protein is thought to have a role in the maintenance of normal lung function and its absence may lead to lung tumourigenesis [1].

1: Inactivation of LLC1 gene in nonsmall cell lung cancer. Hong KM, Yang SH, Chowdhuri SR, Player A, Hames M, Fukuoka J, Meerzaman D, Dracheva T, Sun Z, Yang P, Jen J; Int J Cancer. 2007;120:2353-2358. PMID:17304513