Carbohydrate structure of a thrombin-like serine protease from Agkistrodon rhodostoma. Structure elucidation of oligosaccharides by methylation analysis, liquid secondary-ion mass spectrometry and proton magnetic resonance - Pfeiffer, G; Dabrowski, U; Dabrowski, J; Stirm, S; Strube, KH; Geyer, R (Eur J Biochem, 1992)