the direction of transcription of the carab gene cluster , which codes for escherichia coli carbamoylphosphate synthase , was deduced from the effects of phage mu-1 insertions in each of the two genes and from the results of ribonucleic acid-deoxyribonucleic acid hybridization experiments relating the quantity of car messenger ribonucleic acid to the location of various car mutations .
C0040649
transcription
C0035668
ribonucleic acid