Immunoglobulin superfamily, member 1[5] is a plasma membrane glycoprotein encoded by the IGSF1gene,[6][7][8] which maps to the X chromosome in humans and other mammalian species.
^Mazzarella R, Pengue G, Jones J, Jones C, Schlessinger D (Mar 1998). "Cloning and expression of an immunoglobulin superfamily gene (IGSF1) in Xq25". Genomics. 48 (2): 157–62. doi:10.1006/geno.1997.5156. PMID9521868.
^Frattini A, Faranda S, Redolfi E, Allavena P, Vezzoni P (Jul 1998). "Identification and genomic organization of a gene coding for a new member of the cell adhesion molecule family mapping to Xq25". Gene. 214 (1–2): 1–6. doi:10.1016/S0378-1119(98)00253-4. PMID9729118.