Electron Paramagnetic Resonance of Some γ-Irradiated Amino Acid Derivatives

Abstract

γ -Irradiated powders of N-acetyl-L-arginine, N α -carbamyl-L-arginine, N-glycyl-L-leucine and glycyl-L-alanine were investigated at room temperature by electron paramagnetic resonance. The observed species in N-acetyl-L-arginine and N α -carbamyl-L-arginine were attributed to the CH 2 CHNHCNHNH 2 radical, and those in N-glycyl-L-leucine and glycyl-L-alanine powders to (CH 3 ) 2 CCH 2 and CH 3 CHCOOH radicals.