PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 10550681-2 1999 We show here that cyanamide is hydrated to urea in the presence of CAs, and that it also acts as a weak non-competitive inhibitor (K(I)=61+/-3 mM and 238+/-9 mM for hCA II and hCA I, respectively) towards the esterasic activity of these enzymes, as tested with 4-nitrophenyl acetate. 4-nitrophenyl acetate 261-282 carbonic anhydrase 1 Homo sapiens 165-170