Disulfide Bond Assignments by Mass Spectrometry of Native Natural Peptides: Cysteine Pairing in Disulfide Bonded Conotoxins
Gupta K, Kumar M, Balaram P. Disulfide Bond Assignments by Mass Spectrometry of Native Natural Peptides: Cysteine Pairing in Disulfide Bonded Conotoxins. Analytical Chemistry 2010, 82: 8313-8319. PMID: 20843009, DOI: 10.1021/ac101867e.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid SequenceAnimalsChromatography, High Pressure LiquidConotoxinsConus SnailCysteineDisulfidesPeptidesSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationConceptsS bond cleavageBond cleavageNatural peptidesDisulfide bondsProduct ion yieldsMass spectral fragmentationDisulfide bond assignmentsDisulfide pairingFragment ionsStructure elucidationPeptide backboneBond assignmentDissociation conditionsMass spectrometryMultiple disulfide bondsCysteine pairingsSpectral fragmentationPossible disulfideMultiple cysteine residuesNative peptideAnalytical methodologyBondsCorrect disulfide pairingIon yieldFurther fragmentation