when dl-alpha-monofluoromethylputrescine is used in combination with dl-alpha-difluoromethylarginine ( r.m.i . 71897 ) , an irreversible inhibitor of arginine decarboxylase , in vivo in e. coli , both decarboxylase activities are inhibited ( greater than 95 % ) but putrescine levels are only decreased to about one-third of control values and spermidine levels are slightly increased .
C0034170
putrescine
C0037871
levels