PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 1901803-1 1991 Chemical modification studies suggest that two residues of bovine pancreatic ribonuclease A (RNase A), Lys-41 and Asp-121, are important for catalysis. Aspartic Acid 114-117 ribonuclease pancreatic Bos taurus 77-91 1901803-1 1991 Chemical modification studies suggest that two residues of bovine pancreatic ribonuclease A (RNase A), Lys-41 and Asp-121, are important for catalysis. Aspartic Acid 114-117 ribonuclease pancreatic Bos taurus 93-100