MeSH note : cleaves C3, the third compnent of complement; shows amino acid sequence identities
with 4 regions of procathepsin L; expressed on surface of melanoma cells; amino acid
sequence given in first source; 39 kDa from murine melanoma cell line, 41 kDa from
human melanoma cell line shares antigenic determinants with 39 kDa proteinase and
cathepsin L;