Fast-atom bombardment tandem mass spectrometry of phosphohydroxylysine and related phosphohydroxy amino acids.

Phosphohydroxylysine a compound found in the urine of two patients with a possible inborn error of hydroxylysine metabolism, and related phosphohydroxycompounds were investigated with fast-atom bombardment tandem mass spectrometry techniques. This resulted in a reliable and quick identification method for phospho amino acids in general.