PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 8491675-8 1993 A modified, direct-colouring AChE-method is presented, which uses copper chloride as source of cupric ions, acetylthiocholine chloride as substrate and 2-morpholinoethanesulphonic acid (MES) as buffer. cupric chloride 66-81 acetylcholinesterase Bos taurus 29-33