PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 19407386-3 2009 A joint X-ray and neutron crystallographic study has been initiated to determine the specific water network and the protonation states of the hydrophilic residues that coordinate it in human carbonic anhydrase II. Water 94-99 carbonic anhydrase 2 Homo sapiens 191-212