Fig. 1. MALDI-TOF-MS spectra of 50 ng of (A) N4H4F1 and (B) F1N4H4, using 10 μg DHB + 0.1 μg MCNPs. Highlights show the ISD fragment ions that were selected for pseudo-MS3 analysis. † shows the fucosylated fragment ions; ‡ shows the diagnostic ions. Symbols: 
, N-acetylglucosamine; 
, galactose; 
, fucose; 
, mannose; 
, N-acetylneuraminic acid.
