PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 19904787-0 2009 Deprotonation of the Asp1-Ala2 peptide bond induces modification of the dynamic copper(II) environment in the amyloid-beta peptide near physiological pH. cupric ion 80-90 beta-secretase 2 Homo sapiens 21-25 25090035-4 2014 Our results show that the Asp1 peptide carbonyl binds to Cu(2+) only if the coordination number is less than four. cupric ion 57-63 beta-secretase 2 Homo sapiens 26-30 25090035-8 2014 Our results suggest that at low pH, Cu(2+)-Abeta species with Asp1 carboxylate equatorial coordination coexist with species coordinating the Asp1 carbonyl. cupric ion 36-42 beta-secretase 2 Homo sapiens 62-66 25090035-8 2014 Our results suggest that at low pH, Cu(2+)-Abeta species with Asp1 carboxylate equatorial coordination coexist with species coordinating the Asp1 carbonyl. cupric ion 36-42 beta-secretase 2 Homo sapiens 141-145