The C-Src Proto-Oncogene Encodes a Membrane-Associated, Nonreceptor Tyrosine Kinase

The c-src proto-oncogene encodes a membrane-associated, nonreceptor tyrosine kinase. The v-src oncogene product differs from c-Src in what way?

A) Because of amino acid substitutions in the C-terminus, the v-Src protein remains in theactive conformation and dephosphorylates target proteins.
B) Because of amino acid substitutions in the C-terminus, the v-Src protein remains in theactive conformation, binds to target genes and activates their expression.
C) Because of amino acid substitutions in the C-terminus, the v-Src protein remains in theinactive conformation and cannot phosphorylate target proteins.
D) Because of amino acid substitutions in the C-terminus, the v-Src protein remains in theactive conformation and phosphorylates target proteins.