PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 9790671-5 1998 These pKs are consistent with the involvement of two carboxylic acids, possibly E202(199) and either E334(327) or E450(443), and H447(440)H+ in the dealkylation of AChE. Carboxylic Acids 53-69 acetylcholinesterase (Cartwright blood group) Homo sapiens 164-168