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. Author manuscript; available in PMC: 2013 Feb 6.
Published in final edited form as: Toxicon. 2012 Apr 5;60(1):83–94. doi: 10.1016/j.toxicon.2012.03.019

Fig. 4. MALDI-TOF mass spectra of radula harpoon (top), captive milked venom (middle), and crude duct venom (bottom) obtained from a single specimen of Conus purpurascens.

Fig. 4

Molecular Masses (m/z) common to all three are designated by a triangle (σ). An asterisk (M) indicates peaks that correspond to previously published conopeptides derived from C. purpurascens. 2,5-dihydroxybenzoic acid (DHB) was used as the matrix. One advantage of using DHB is that there is a low occurrence of matrix peaks and matrix adducts. To further ensure that common masses observed are not matrix peaks, mass spectra were compared to ‘matrix only’ mass spectra. No matrix peaks were detected.