PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 15507687-3 2004 Anchors for our study are available in crystallographic structures of the DNA pol-beta in "open" (polymerase bound to gapped DNA) and "closed" (polymerase bound to gapped DNA and substrate, dCTP) forms; these different states have long been used to deduce that a large-scale conformational change may help the polymerase choose the correct nucleotide, and hence monitor DNA synthesis fidelity, through an "induced-fit" mechanism. 2'-deoxycytidine 5'-triphosphate 190-194 DNA polymerase beta Homo sapiens 78-86