Figure 5.

Mass spectra of the Endopep-MS botulinum neurotoxin B1 reaction after extraction of the toxin with mAb B12.2 (5A), no antibody (5B), or mAb B1.1 (5C). The peptide cleavage product indicates the presence of BoNT/B in 5A and 5B, but not 5C, at m/z 1759.9 and the internal standard is present in all spectra at m/z 1766.9.

Kalb et al. BMC Biochemistry 2011 12:58   doi:10.1186/1471-2091-12-58
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