incubation of s49 lymphoma cells with n6 , o2'-dibutyryl cyclic amp ( bt2camp ) decreases the activities of ornithine decarboxylase ( l-ornithine carboxy-lyase ; ec 4.1.1.17 ) and s-adenosylmethionine decarboxylase ( s-adenosyl-l-methionine carboxy-lyase ; ec 4.1.1.50 ) , the two principal enzymes in the pathway of polyamine synthesis .
C0029282
l-ornithine carboxy-lyase
C0007054
carboxy-lyase