Acid–base studies of glutathione (<scp>L</scp>-γ-glutamyl-<scp>L</scp>-cysteinyl-<scp>L</scp>-glycine) by one- and two-dimensional nuclear magnetic resonance spectroscopy

Abstract

All the 13C resonances for the tripeptide glutathione are assigned, and their behaviour in the pD range 0.7–1 2.3 explored, by means of 13C n.m.r. titrations and via two-dimensional C–H correlation experiments involving both C–H one-bond relationships and long-range connections from CO groups to remote protonated carbons.