PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 33795736-5 2021 We find that micromolar concentrations of iron(III) and copper(II) are more important sinks for ascorbic acid (both AH2 and AH-) than reactive oxygen species. Iron 42-46 zinc finger RANBP2-type containing 3 Homo sapiens 116-119 1779704-1 1991 Fluorescence and non-enzymatic browning were observed in reactions between ascorbic acid (AH2) and amino acids (AA) as well as in reactions involving AH2 autoxidation and/or polymerization in the presence of trace amounts of adventitious iron (less than or equal to 10 microM). Iron 238-242 zinc finger RANBP2-type containing 3 Homo sapiens 150-153 33795736-6 2021 The iron and copper reactions are catalytic rather than redox reactions, and have unit stoichiometries: Fe(III)/Cu(II) + AH2/AH- + O2 Fe(III)/Cu(II) + H2O2 + products. Iron 4-8 zinc finger RANBP2-type containing 3 Homo sapiens 121-124