CRYSTAL STRUCTURE OF ACETYLCHOLINESTERASE IN COMPLEX WITH K027 HYDROLASE, SERINE ESTERASE, ALTERNATIVE SPLICING, NEUROTRANSMITTER DEGRADATION, K026, OXIME, SYNAPSE, MEMBRANE, SECRETED, CELL MEMBRANE, DISULFIDE BOND, CHOLINESTERASE, GPI-ANCHOR, LIPOPROTEIN, GLYCOPROTEIN, CELL JUNCTION 2WHR