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Mass fragmentation of the purified sperm toxin of B. cereus 4810/72. (A) m/z of the molecular ions as determined by ESI-MS. (B) ESI-MS/MS fragmentation of the protonated ion, m/z of 1,153.85, shown in panel A. Peak numbers correspond to the fragment ions assigned in Table 3. Peaks marked with asterisks represent loss of water.
