we report here that chicken embryo fibroblasts ( cef ) transformed by aev show enhanced tyrosine phosphorylation of a number of cellular polypeptides , including the 36 kd protein , which is phosphorylated in avian sarcoma virus-transformed fibroblasts , and the 42 kd protein , which is phosphorylated in mitogen-stimulated cells .
C0016030
fibroblasts
C0007634
cells