because ( i ) the conserved 5 ' gag-related and internal rna segments and their gag-related , nonvirion protein products correlate with the conserved oncogenic spectra of the mc29 group of viruses and because ( ii ) the internal rna sequences and nonvirion proteins are not found in nondefective viruses , we propose that the conserved rna and protein elements are necessary for oncogenicity and probably are the onc gene products of the mc29 group of viruses .
C0033684
proteins
C0042736
gene products