title: Fast atom bombardment: evidence of disproportionation and recombination of a synthetic porphyrin in the matrix.
abstract: In addition to dimerization and polymerization of samples as previously suggested, it appears that during FAB-MS, reactions in the sample matrix can occur to yield new compounds that are recombinations of molecular fragments. This type of reaction may be especially critical to the integrity of peptide sequencing using FAB, since the reactions cited in this report involve the formation and rupture of amides or peptide bonds.
mesh_terms: D003905:Deuteroporphyrins; D008401:Gas Chromatography-Mass Spectrometry; D011166:Porphyrins; D013057:Spectrum Analysis / Q000379:methods
chemical_list: D003905:Deuteroporphyrins; D011166:Porphyrins