Wagner, T E Paramagnetic labeling studies. 1. A new method for labeling proteins with a stable paramagnetic nitroxide radical. [electronic resource] - Analytical biochemistry Jul 1970 - 1-5 p. digital Publication Type: Journal Article ISSN: 0003-2697 Standard No.: 10.1016/0003-2697(70)90324-6 doi Subjects--Topical Terms: Cyclic N-OxidesElectron Spin Resonance SpectroscopyFree RadicalsHydrogen-Ion ConcentrationLysineMethodsPeptidesProteins--analysis