Diagram of immunoglobulin-like transcript 3 gene with single nucleotide polymorphism (SNP) locations indicated by coloured lines above the gene, yellow indicates an intronic SNP, green indicates a synonymous SNP, and red indicates a coding change SNP. Ig 1 and Ig 2, immunoglobulin-like domains 1 and 2; Stalk, short peptide sequence between TM and Ig 2; TM, transmembrane sequence.