Nucleoside diphosphate (NDP) kinase from bovine retina was found to contain carbohydrates. The subunits of NDP kinase were separated by SDS-PAGE, blotted onto an Immobilon-P membrane, and their carbohydrate content was determined. Both subunits contained equal amounts of Gal, Man, Fuc, Gal-NAc, and Glc-NAc. The total carbohydrate content was 2 to 3% of the protein weight.
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