dna sequence analysis of the activated oncogene from the t24 human bladder carcinoma line and two alleles of its normal cellular progenitor ( c-ha-ras-1 ) indicates that the genes encompass at least four exons , and that only a single point mutation residing within the first exon distinguishes the coding region of both alleles of the normal gene from their activated counterpart .
C0007634
cellular
C0079941
coding region