Setner, Bartosz New ionization tags based on the structure of the 5-azoniaspiro[4.4]nonyl tag for a sensitive peptide sequencing by mass spectrometry. [electronic resource] - Analytical and bioanalytical chemistry Feb 2018 - 1311-1321 p. digital Publication Type: Journal Article ISSN: 1618-2650 Standard No.: 10.1007/s00216-017-0771-2 doi Subjects--Topical Terms: Amino Acid SequenceHeterocyclic Compounds--chemistryPeptides--chemistryQuaternary Ammonium Compounds--chemistrySpectrometry, Mass, Electrospray Ionization--methods