realizes has_specified_input inheres in role of has role molecular entity oxygen radical evaluant role reagent role footprinting assay hydroxyl-radical footprinting assay A footprinting assay that uses the reaction of hydroxyl radicals with side-chain sites in molecules (proteins, DNA, etc)_ with the resultant mass shift demonstrating the site of modification, used to_ to asses the accessibility of that site. Jie Zheng PMID:21770468 hydroxyl-radical footprinting assay metadata complete