n4-methoxycytidine ( mo4c ) , previously found to act only as uridine ( u ) in transcription [ singer , b. , & spengler , s. ( 1981 ) biochemistry 20 , 1127 ] , was tested for its ability to base pair as u in copolymers of ( u , mo4c ) annealed with poly ( a ) or transcribed with atp and dna-dependent rna polymerase .
C0040649
transcription
C0035681
dna-dependent rna polymerase