Maltose biosynthesis

Maltose, l- 4- -link in, 998 molecular model of, 998 mutarotation of, 998 structure of, 998 Manicone, synthesis of. 805 Mannich reaction. 915 Mannose, biosynthesis of, 1011 chair conformation of, 126 configuration of, 982 molecular model of, 126 Margarine, manufacture of, 1063 Markovnikov. Vladimir Vassilyevich. 192... 

Scheme 20a, b. Disaccharide transfers are thought to be involved in the biosynthesis of acarbose (16, transfer of maltose) and landomycin A (12, transfer of diolivoside units)... 

Schwoch studied the synthesis of trehalose in the crayfish, Orconectes limosus. Biosynthesis of the disaccharide could be detected in the abdominal muscle, antennal gland, hind-gut, integumentary tissue, and, to a lesser extent, in the stomach tissue. The trehalose 6-phosphate synthetase was soluble and was inhibited 50 by 80 milf trehalose. The rate of synthesis of trehalose was dependent on the season, and optimal activity in abdominal muscle occurred in February and March. The label from injected [ Cjtrehalose or D-[ C]glucose was foimd to be distributed from the hemolymph into organs much faster than the label from [ C]maltose. 

The jS-D-glucosidase of Mucor racemosus was shown to be biosynthesized when the organism was grown in the presence of such diverse carbon sources as glycerol, lactate, o-xylose, o-ribose, methyl and phenyl a-o-glucopyrano-sides, maltose, and cellobiose. Enzyme biosynthesis was strongly repressed in the presence of hexoses and of adenosine 3, 5 -monophosphate. The role of adenosine 3, 5 -monophosphate in the control of jS-D-glucosidase synthesis in M. racemosus was discussed. 

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