ID   4.2.2.18
DE   inulin fructotransferase (DFA-III-forming).
AN   inulase II.
AN   inulinase II.
AN   inulin D-fructosyl-D-fructosyltransferase (1,2':2,3'-dianhydride-
AN   forming).
AN   inulin D-fructosyl-D-fructosyltransferase (forming alpha-D-fructofuranose
AN   beta-D-fructofuranose 1,2':2,3'-dianhydride).
AN   inulin fructotransferase (depolymerizing, difructofuranose-
AN   1,2':2,3'-dianhydride-forming).
AN   inulin fructotransferase (depolymerizing).
AN   inulin fructotransferase (DFA-III-producing).
CA   Produces alpha-D-fructofuranose beta-D-fructofuranose
CA   1,2':2,3'-dianhydride (DFA III) by successively eliminating the
CA   diminishing (2->1)-beta-D-fructan (inulin) chain from the terminal
CA   D-fructosyl-D-fructosyl disaccharide.
CC   -!- This enzyme, like EC 4.2.2.16 and EC 4.2.2.17 eliminates the fructan
CC       chain from the terminal disaccharide leaving a difructose
CC       dianhydride.
CC   -!- These enzymes have long been known as fructotransferases, so this is
CC       retained in the description (official name).
CC   -!- Since the transfer is intramolecular, the reaction is an elimination
CC       and, hence, the enzyme is a lyase, belonging in enzyme class 4.-.-.-.
CC   -!- Formerly EC 2.4.1.93.
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