– V-set and transmembrane domain containing 1 (VSTM1) is a protein containing the V-set domains. V-set domains are immunoglobulin-like domains resembling the antibody variable region. V-set domains are found in many kinds of protein families, including immunoglobulin light and heavy chains, several T-cells such as CD2, CD4, CD80, and CD86, myelin membrane adhesion molecules, junction adhesion molecules (JAM), tyrosine-protein kinase receptors, and the programmed cell death protein1. VSTM1 Protein, Human, Recombinant (His) is expressed in HEK293 mammalian cells with His tag. The predicted molecular weight is 15 kDa and the accession number is Q6UX27-16.