Maltose-l-phosphate

Phosphorylase is specific with regard to its action upon < -D-glucose-l-phosphate the / -isomer cannot serve as a substrate for this enzyme. Neither can any other sugar ester be substituted for glucose-l-phosphate. a-L-Glucose-l-phosphate, maltose-l-phosphate, a-D-xylose-l-phosphate could not be polymerized to polysaccharide by potato phosphorylase. - The a-forms of D-mannose-l-phosphate and D-galactose-l-phosphate were not acted upon by muscle phosphorylase. ... 

Maltose phosphorylase proceeds via a single-displacement reaction that necessarily requires the formation of a ternary maltose E Pi (or glucose E glucose-l-phosphate) complex for any reaction to occur. Exchange reactions are a characteristic of enzymes that obey double-displacement mechanisms at some point in their catalysis. 

Carbohydrates amygdalin, cellobiose, cellulose, fructose, galactose, glucose, glucose-l-phosphate, glucose-6-phosphate, lactose, maltose, pullulane, starch, sucrose. 

Huwel S, Haalck L, Coniath N et al (1997) Maltose phosphorylase firom Lactobacillus brevis purification, characterization, and application in a biosensor for ortho-phosphate. Enzyme Microb Technol 21 413-420... 

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