Avian sarcoma virus Y73 genome sequence and structural similarity of its transforming gene product to that of Rous sarcoma virus

Abstract
From the complete nucleotide sequence of the genome of the avian sarcoma virus Y73, the amino acid sequence of p90gag-yes, the product of the transforming gene, was predicted. p90gag-yes was found to have much homology with the transforming gene product p60src of Rous sarcoma virus, suggesting that the avian cellular counterparts (c-yes and c-src) of the 2 viruses originated from a common prototype sequence.