in contrast to transcription in a spinach chloroplast extract , which requires initiation of exogenously added genes ( gruissem , w. , greenberg , b. m. , zurawski , g. , and hallick , r. b . ( 1983 ) cell 35 , 815-828 ) , rna synthesis in the run-on system is not affected by heparin or different salt concentrations .
C0040649
transcription
C1328948
rna