Journal
TOXICON
Volume 57, Issue 5, Pages 730-738Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.toxicon.2011.02.005
Keywords
Amino acid; Mass spectrometry; UHPLC; Neurodegenerative disease; Environmental toxin; Diaminopimelic acid
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beta-N-methylamino-r-alanine (BMAA) is produced by diverse taxa of cyanobacteria, and has been detected by many investigators who have searched for it in cyanobacterial blooms, cultures and collections. Although BMAA is distinguishable from proteinogenic amino acids and its isomer 2,4-DAB using standard chromatographic and mass spectroscopy techniques routinely used for the analysis of amino acids, we studied whether BMAA could be reliably distinguished from other diamino acids, particularly 2,6-diaminopimelic acid which has been isolated from the cell walls of many bacterial species. We used HPLC-FD, UHPLC-UV, UHPLC-MS, and triple quadrupole tandem mass spectrometry (UHPLC-MS/MS) to differentiate BMAA from the diamino acids 2,6-diaminopimelic acid, N-2(amino)ethylglycine, lysine, ornithine, 2,4-diaminosuccinic acid, homocystine, cystine, tryptophan, as well as other amino acids including asparagine, glutamine, and methionine methylsulfonium. (C) 2011 Elsevier Ltd. All rights reserved.
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