Jansen E H, Meyer H, de Haas G H
J Biol Chem. 1978 Sep 25;253(18):6346-7.
Application of the photochemically induced dynamic nuclear polarization technique to porcine pancreatic phospholipase A2 and its precursor resulted in the observation of nuclear spin polarization for the single tryptophan and 2 tyrosine residues. Using selectively nitrated enzymes, the tyrosine resonances could be assigned to residues 69 and 123. Both tryptophan-3 and tyrosine-69 are of particular interest because they are part of the lipid binding site.
