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Australian Journal of Chemistry Australian Journal of Chemistry Society
An international journal for chemical science
RESEARCH ARTICLE

Collision-Induced Dissociations of Deprotonated Peptides. Dipeptides Containing Asn, Arg and Lys

RJ Waugh, JH Bowie and ML Gross

Australian Journal of Chemistry 46(5) 693 - 702
Published: 1993

Abstract

The presence and position of Asn, Arg and Lys residues in dipeptides may be determined from a consideration of the collisional activation mass spectra of the (M-H)- ions formed by fast atom bombardment. All spectra show the basic dipeptide cleavage, i.e. NH2CH(R1)CONHCH(R2)CO2- → NH2C(R1)CONHCH(R2)CO2H → NH2C(R1)=C=O + -NHCH(R2)CO2H. There are a number of fragmentations characteristic of a particular α side chain: for example, Arg loses HN=C=NH (42 u).

https://doi.org/10.1071/CH9930693

© CSIRO 1993

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