using purified recombinant ras p21 from escherichia coli expressing the full-length t24 mutant human harvey-ras gene protein product as a standard in these rias , we have defined the absolute numbers of pg , fm and molecules of ras p21 in : ( 1 ) e. coli expressing the point-mutated or proto-ras p21 and ( 2 ) mammalian cell lines of human and murine origin .
C0086418
human
C0034678
ras