to facilitate the study of monomeric butyrylcholinesterase , it was separated from the larger butyrylcholinesterase and acetylcholinesterase , also present in rabbit serum , and purified 89-fold by fractionation with ( nh ( 4 ) ) ( 2 ) so ( 4 ) and ion-exchange chromatography .
C0008429
butyrylcholinesterase
C0001044
acetylcholinesterase