Patent ID: 7528100

Claim:
A derivatized polysaccharide polymer, comprising a levan polyfructose polymer substrate bearing one or more cationic substituent groups, wherein the levan polyfructose polymer substrate comprises fructosyl units that are linked by β,2-6 linkages and comprises formula (XI): wherein: n′ is a number effective to provide a weight average molecular weight of from about 1×10 4 to about 1×10 7 Daltons, as measured by gel permeation chromatography, each R 7 is independently a cationic moiety each R 8 is independently CH 2 OH or CH 2 R 7 , each R 9 is independently OH or R 7 , each R 13 is independently CH 2 OH, CH 2 R 7 , or CH 2 R 14, each R 14 is independently a fructosyl branch moiety according to structure (XII): wherein each R 11 is independently OH or R 7 each R 12 is independently CH 2 OH or CH 2 R 7 , and each m′ independently 0, 1, 2, or 3, and provided that at least one R 9 is R 7 , or at least one R 13 is CH 2 R 7 , or at least one R 13 is a fructosyl branch moiety according to formula (XII) and at least one R 11 is R 7 or at least one R 12 is CH 2 R 7 .