Biodegradation of Starch and Dextran to Cyclodextrins

The CGTases also catalyze acceptor or transfer reactions between the cyclic maltodextrins and a carbohydrate acceptor [31,32]. In these acceptor reactions, the cyclodextrin ring is opened and the acceptor is specifically added to the reducing end of the maltodextrin chain that is formed from the cyclodextrin. The reaction is as follows  

The maltodextrin acceptor product undergoes further disproportionation reactions in which two linear chains interact to transfer part of one chain to the other chain, as formulated in reaction (11.6). 

Several different disproportionation reactions can occur to give a wide range of maltodextrin products with different chain lengths, as shown in the following reactions  

The cycloisomaltodextrins (see section 8.4 in Chapter 8) are produced from B-512F dextran by the action of cycloisomaltodextrin glucanosyltransferase (CIG-Tase), elaborated by a Bacillus sp. Cycloisomaltodextrins with seven, eight, and 

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