in contrast to gene products of many previously described mammalian transforming viruses , 3611-msv-encoded polyproteins lack detectable protein kinase activity , and 3611-msv-transformed cells resemble chemically transformed cell line c3h/mca-5 , from which 3611-mulv was originally derived , in that they do not exhibit elevated levels of phosphotyrosine .
C0033684
gene products
C0032583
polyproteins