PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 2271656-3 1990 Escherichia coli endonuclease III was used to quantitate the formation and stability of these hydrates in the double-stranded alternating copolymers poly(dG-dC) and poly(dA-dU). poly(dC-dG) 149-160 endonuclease III Escherichia coli 17-33