. "\"Catalysis of the reaction: alpha,alpha-trehalose + phosphate = alpha-D-glucose + alpha-D-glucose 1-phosphate.\" [EC:2.4.1.231]" . . "alpha,alpha-trehalose phosphorylase (configuration-retaining) activity" . "alpha,alpha-trehalose:phosphate alpha-D-glucosyltransferase activity" . "MetaCyc:RXN-4441" . . "trehalose phosphorylase activity" .