This 281 amino acid type 1 transmembrane protein contains an immunoglobulin and mucin-like domain in its extra-cellular portion and a tyrosine phosphorylation motif in its cytoplasmic portion. Tim-3 is a member of the immunoglobulin super-family and is expressed on Th1 lymphocytes and CD11b+ macrophages. Tim-3 is a T helper type 1 (TH1)-specific molecule that regulates TH1 mediated auto and alloimmune responses and the induction of peripheral immunological tolerance.Synonyms: HAVCR-2, Hepatitis A virus cellular receptor 2, T-cell membrane protein 3, TIM-3, TIM3, TIMD-3