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Cytochrome b-245 is a glycoprotein. It runs as a broad band on sodium dodecyl sulphate/polyacrylamide-gel electrophoresis and its apparent Mr varies with the concentration of acrylamide. It stained positively with Schiff reagent and with silver stains after oxidation with periodic acid. It preferentially bound the lectin of Phaseolus vulgaris (type III), and cleavage of carbohydrate with endoglycosidase F resulted in a sharp band on sodium dodecyl sulphate/polyacrylamide-gel electrophoresis with an apparent Mr of 55000 G.l.c. analysis of carbohydrate showed this to account for about 15% of the Mr and N-acetylglucosamine and galactose to be the major sugars.
Harper et al. (Wed,) studied this question.
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