Biological Magnetic Resonance Data Bank

A Repository for Data from NMR Spectroscopy on Proteins, Peptides, Nucleic Acids, and other Biomolecules
Member of WWPDB

Find Formula/Molecule by Mass

This page is meant to be a tool for mass spectrometry. The monoisotopic masses for nearly 11 000 biologically relevant organic molecules have been calculated and inserted into a database to be searched against.

Mass distribution:
ppm dalton

MonoIsotopic composition:
Natural composition (12C 14N)
13C labeled 15N labeled 13C and 15N labeled

+1 (additional H+) neutral -1 (one less H+)
+1 (one less e-) neutral -1 (additional e-)

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