a protein found in skin and eye cells that make melanin (a pigment that gives color to the skin and helps protect it from damage by ultraviolet light). people with certain changes in the gene for melanotropin receptor have a higher risk of developing melanoma (skin cancer that begins in melanocytes). also called melanocortin 1 receptor and mc1r.
a substance on the surface of a cell which recognizes and reacts to insulin called insulin acceptor
a substance that recognizes hormones on the surface of cells and catches them
a drug that is used as an immunosuppressant, called azathioprine
a protein that interacts with another protein and enzyme when blood clots