|Detection of Ly6K in HeLa Human Cell Line by Flow Cytometry. HeLa human cervical epithelial carcinoma cell line was stained with Mouse Anti-Human Ly6K APC‑conjugated Monoclonal Antibody (Catalog # FAB6648A, filled histogram) or isotype control antibody (Catalog # IC003A, open histogram). View our protocol for Staining Membrane-associated Proteins.|
Ly6K (Lymphocyte antigen 6 locus K; also CO16) is a 26-27 kDa member of the Ly-6 antigen family of molecules. It has restricted expression, being described in testis and skin. Ly6K is found in/on carcinomas, and is known to circulate in normal and tumor-patient blood. Mature human Ly6K is a 121 amino acid (aa) GPI-linked (presumed) glycoprotein. It is synthesized as a 165 aa preproprecursor that contains a 17 aa signal sequence, a 121 aa mature region (aa 18-138), and a 27 aa C‑terminal propeptide. There are two potential splice variants, one that shows a 48 aa substitution, and another that shows a 33 aa substitution for aa 73-165. It is not clear if mouse Ly6K is a true molecular ortholog of human Ly6K. In any event, over aa 18-138, human Ly6K shares 39% aa identity with mouse Ly6K.