the rates of incorporation of [ ( 14 ) c ] adenine and [ ( 14 ) c ] hypoxanthine into purine ribonucleotides were much less than the potential activities of adenine phosphoribosyltransferase and hypoxanthine phosphoribosyltransferase , and the rates of incorporation were stimulated by the addition of guanosine to the incubation mixture .
C0001407
adenine
C0034140
purine