... Kalkkinen11Institute of Biotechnology, Protein Chemistry Laboratory, University of Helsinki, Finland,2Norwegian College of Fishery Science,University of Tromsø, Norway,3Institute of Medical Biology, University ... R3 (PerSeptive Biosystems,Framingham MA, USA) tip, and a sample of the flow-through carrying the glycans was drop-dialysed and analysed by MALDI-TOF MS.RESULTSIsolation of cysteine proteinase ... biantennary and triantennary N-glycans that are terminated by a2,3-linkedsialic acids, a high number of which are O-acetylated. About1/3 of the glycans carry sulfate at N-acetylglucosamine unitsof...