Abstract
Two and three new cyclomaltoheptaose (β-cyclodextrin, cG 7) derivatives, respectively, were identified among the products obtained by the action of Pseudomonas isoamylase on maltose and maltotriose, and cG 7. They were 6 A,6 D-di- O-α-maltosyl-cG 7 and 6- O-α-(6 2- O-α-maltosyl)maltosyl-cG 7, and 6 A,6 D-di- O-α-maltotriosyl-cG 7, 6- O-α-(6 3- O-α-maltotriosyl)maltotriosyl-cG 7, and 6- O-α-(6 2- O-α-maltotriosyl)maltotriosyl-cG 7. In addition, 6 1- and 6 2- O-α-maltosylmaltose were identified as mutual condensation products of maltose. Maltose was the smallest substrate to act as both an acceptor and a donor for the action of Pseudomonas isoamylase.
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