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. 2013 Dec 27;6:60. doi: 10.1186/1756-6606-6-60

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Copyright © 2013 Salisbury et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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High resolution MALDI-FTICR MS resolves neuropeptides PDNFMRFamide and Drostatin-3 (Ast-A3), convoluted in MALDI-TOF mass spectra. Through the use of MALDI-FTICR MS, we were able to resolve m/z 925.481 from the MALDI-TOF MS (top) as being the convolution of two neuropeptides. PDNFMRFamide, identified by MALDI-TOF/TOF MS/MS fragmentation, was observed in MALDI-FTICR MS (bottom) as 925.43564 (theoretical monoisotopic [M + H]⁺ = 925.43594). A second peak at m/z 925.49004 was tentatively assigned to correspond to Drostatin-3 (Ast-A3, calculated [M + H]⁺ = 925.48994).