One of a number of recombinant peptides consisting of amino acid residues of the enzyme tyrosinase, a protein frequently expressed by melanoma cells. Vaccination with tyrosinase peptide may stimulate cytotoxic T lymphocyte response against tyrosinase-expressing tumor cells, resulting in decreased tumor growth. OR A protein that is made from tumor cells and is used in a vaccine against melanoma. A tyrosinase peptide vaccine may stimulate the body's immune system to find and kill melanoma cells.