Gel-filtration Chromatography of Dextrans and Maltodextrins on a Water-insoluble Dietary Fiber Column

Abstract

The permeability of water-insoluble dietary fiber from Japanese radish to authentic dextrans and maltodextrins was investigated by gel-filtration chromatography. A column of the fiber was found to resolve dextrans and maltodextrins of molecular weight 2.0×10³-5.0×⁵, although the resolving power of the column was rather low. Maltodextrins of molecular weight less than about 2.0×10³ completely permeated into the pores of the wall matrix in the dietary fiber. The physiological role of waterinsaluble dietary fiber is discussed on the basis of these results.