title: Field desorption mass spectrometry of peptides.
mesh_terms: D001120:Arginine / Q000032:analysis; D006639:Histidine / Q000032:analysis; D013058:Mass Spectrometry; D008722:Methods; D008745:Methylation; D010455:Peptides / Q000032:analysis*
chemical_list: D010455:Peptides; D006639:Histidine; D001120:Arginine