using strain mg1655 of escherichia coli k-12 ( f- , lambda- ) , we have determined the effects of polyamines and changes in growth rate on the transcription of several ribosomal genes and the polyamine-synthesizing enzymes ornithine decarboxylase ( l-ornithine carboxy-lyase ; ec 4.1.1.17 ) and arginine decarboxylase ( l-arginine carboxylyase ; ec 4.1.1.19 ) .
C0029282
l-ornithine carboxy-lyase
C0007054
carboxylyase