PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 9398305-1 1997 Maximal turnover rates for the hydration of CO2 and the depletion of 18O from CO2 catalyzed by carbonic anhydrase III (CA III) and carbonic anhydrase V (CA V) are limited by proton transfer involving zinc-bound water or hydroxide in the active site. hydroxide ion 220-229 carbonic anhydrase 5A Homo sapiens 131-151 9398305-1 1997 Maximal turnover rates for the hydration of CO2 and the depletion of 18O from CO2 catalyzed by carbonic anhydrase III (CA III) and carbonic anhydrase V (CA V) are limited by proton transfer involving zinc-bound water or hydroxide in the active site. hydroxide ion 220-229 carbonic anhydrase 5A Homo sapiens 153-157