.p ( o ) ( ch2 ) 3ch3 , on acetylcholinesterase from nervous ganglia of cockroach periplaneta americana and bovine erythrocytes as well as on horse serum butyrylcholinesterase was studied at ph 7.5 and 25 degrees c .
C0001044
acetylcholinesterase
C0008429
butyrylcholinesterase