PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 8670138-7 1996 The above results indicate that the activation of DHFR in dilute denaturants is accompanied by a loosening up of its compact structure especially at or near the active site, suggesting that the flexibility at its active site is essential for the full expression of its catalytic activity. denaturants 65-76 dihydrofolate reductase Gallus gallus 50-54