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MALDI-TOF mass spectrometry showing the masses of human α-defensin HNP-1 and human β-defensins HBD1, HBD2 and HBD3. Predicted masses were 3,448.1 Da for HNP-1, 3,934.6 Da for HBD1, 4,164.0 Da for HBD2 and 5,161.2 Da for HBD3. Distinct peaks were seen at 3,446.973 m/z, 3,934.616 m/z, 4,340.865 m/z and 5,167.895 m/z.
