Procainamide labeling permits glycan identification by either mass spectrometry or (U)HPLC. Because of its improved ionisation efficiency compared to 2AB labeling it can permit identification of minor glycans (<1% relative peak area) by ESI-MS. • The LudgerTag Procainamide Labeling Kit is suitable for N-glycans, O-glycans, GSL-glycans, heparin or any sugar with a reducing terminus. It uses the same reductive amination labeling method that has been used for 2-AB & 2-AA. Procainamide labeling is suitable 25 pmol – 25 nmol samples. • The kit contains reagents for the conjugation of dye to the free reducing end of the glycan by a reductive amination reaction with essentially stoichiometric labeling. Any purified glycans with free reducing termini can be labeled.