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A study of human coagulation factor XIII A‐subunit by electrospray ionisation mass spectrometry
Author(s) -
Ashcroft Alison E.,
Grant Peter J.,
Ariëns Robert A. S.
Publication year - 2000
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/1097-0231(20000915)14:17<1607::aid-rcm69>3.0.co;2-l
Subject(s) - chemistry , electrospray ionization , mass spectrometry , chromatography , electrospray , electrospray mass spectrometry , protein subunit , biochemistry , gene
A study of factor XIII A‐subunit has been made by electrospray ionisation mass spectrometry. Factor XIII has been isolated and rigorously purified, and the intact A‐subunit protein has been analysed to confirm its molecular weight accurately for the first time. Thrombin proteolysis of the A‐subunit has been monitored and the resulting cleavage products, the activated A‐subunit protein and the Activation Peptide, have been analysed by electrospray ionisation mass spectrometry to confirm the site of proteolysis. Facile and rapid separation of the Activation Peptide from the activated A‐subunit protein has been achieved using simple on‐line separation techniques. The molecular weight measurements have been repeated numerous times to provide an indication of the precision and variability of the analyses. Copyright © 2000 John Wiley & Sons, Ltd.