parameters of rna synthesis were measured after a temperature upshift in a pair of escherichia coli b/r strains that are isogenic except for having rela and rela+ loci , to examine the cause for a reported anomaly in the correlation between guanosine tetraphosphate ( ppgpp ) and stable rna ( rrna , trna ) synthesis under such conditions .
C0035668
rna
C0035701
rrna