Mink type C virus: biochemical characterization of the structural polypeptides.

Mink type C virions contained six major protein species of approximate M.W. of 90,000, 70,000, 30,000, 15,000, 12,000 and 10,000. The two largest polypeptides were glycosylated and the 12,000 M.W. polypeptide was the major phosphoprotein of the virion. Two-dimensional tryptic peptide map of the 30,000 M.W. major structural protein of MiLV showed a pattern distinct from those of analogous proteins from mouse and endogenous cat type C viruses. Significant peptide homology of this protein was, however, found with the corresponding protein of infectious feline type C virus (FeLV).