The classical researches of Hanes, Peat and their co-workers (for reviews, see Barker & Bourne, 1953; Whelan, 1958) have established that two distinct enzymes are involved in the synthesis of amylopectin from OC-D-glucosyl phosphate. Thus Penzyme (potato phosphorylase) action results in the formation of linear amylose-type molecules which are converted into amylopectin by Q-enzyme. Alternatively, the combined action of Pand Qenzymes on oX-D-glucosyl phosphate also yields a branched polysaccharide, although Q-enzyme alone has no action on the glucoside. In the animal kingdom a related enzyme system may be partly responsible for glycogen synthesis. Muscle phosphorylase synthesizes amylose-type chains from OC-D-glucosyl phosphate and the concurrent action of this enzyme and an enzyme pre
Incubation of a 15% solution of maltose with a brewer's yeast maltase preparation resulted in the formation of small amounts of oligosaccharides. These have been separated by charcoal‐Cefite chromatography, and characterized by chemical and enzymic methods as isomaltose, panose and maltotriose. The same enzyme preparation also catalysed limited oligosaccharide synthesis from glucose. Possible mechanisms of saccharide synthesis are discussed and the properties of yeast maltase and of other maltases are compared.
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