Levan fructotransferase (DFA-IV-forming)

The enzyme levan fructotransferase (DFA-IV-forming) catalyzes the following process:


 * Produces di-β- D -fructofuranose 2,6′:2′,6-dianhydride (DFA IV) by successively eliminating the diminishing (2→6)-β- D -fructan (levan) chain from the terminal D -fructosyl- D -fructosyl disaccharide

This enzyme belongs to the family of lyases, specifically those carbon-oxygen lyases acting on polysaccharides. The systematic name of this enzyme class is 2→6-β- D -fructan lyase (di-β- D -fructofuranose-2,6′:2′,6-dianhydride-forming).

Other names in common use include 2,6-β- D -fructan D -fructosyl- D -fructosyltransferase (forming, di-β- D fructofuranose 2,6′:2′,6-dianhydride), and levan fructotransferase.