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Fast atom bombardment mass spectra of peptides. Dimer ion studies. Part VI

✍ Scribed by K. Jankowski; H. Virelizier; D. Gaudin; J.-C. Tabet

Publisher
John Wiley and Sons
Year
1989
Tongue
English
Weight
392 KB
Volume
18
Category
Article
ISSN
1076-5174

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✦ Synopsis

Positive ion fast atom bombardment mass spectra of the opioid pentapeptides leucine enkephalin (1) (H-Tyr-Gly-Gly-Phe-Leu-OH or YGGFL), methionine enkephalin (2) (H-Tyr-Gly-Gly-Phe-Met-OH or YGGFM) and leucine enkephalin-2H, (3) (H-Tyr-fCly-2H,-Gly-Phe-Leu-OH or YGGFL-'H,) have been recorded in glycerol. The following experiments have been carried out: (i) dimer studies [ZM + 11'; (ii) decompositions of dimers: daughter ions from (YGGFL), , (YGGFL-YGGFL-2H2) and (YGGFL-2H2), as well as (YGGFM-YGGFL) and (YGGFM), dimers; (Β‘U) solvation site and pyridine collision-activated dissociation studies for dimer ions; (iv) mechanism of formation of [(ZM + 1) -Gly,]+ ions.

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