Cellulose was from Whatman. Sepharose and Sephadex were from Pharmacia. AIkylaminea and cyanogen bromide were from Fluka AG. Amino acid analysis were performed on a Beckman 120 after acid hydrolysis (6 M HC1, lOO OC, 24 h). 6 The NMR spectra were measured on a Varian A60 spectrometer, using tetramethylsilane as an internal standard (6 0) and DzO as solvent. Silica gel was used for thin-layer chromatography. High-voltage ...