"Catalysis of the reaction: 1,4-alpha-D-glucosyl(n) + phosphate = 1,4-alpha-D-glucosyl(n-1) + alpha-D-glucose 1-phosphate. The name should be qualified in each instance by adding the name of the natural substrate, e.g. maltodextrin phosphorylase, starch phosphorylase, glycogen phosphorylase [goid 4645] [evidence IEA]; Interacting selectively with a nucleotide, any compound consisting of a nucleoside that is esterified with (ortho)phosphate or an oligophosphate at any hydroxyl group on the ribose or deoxyribose moiety [goid 166] [evidence IEA]; Interacting selectively with a purine, an organic nitrogenous base [goid 2060] [pmid 12204691] [evidence IDA]; Interacting selectively with ATP, adenosine 5'-triphosphate, a universally important coenzyme and enzyme regulator [goid 5524] [pmid 10949035] [evidence IDA]; Interacting selectively with the D- or L-enantiomer of glucose [goid 5536] [pmid 12204691] [evidence NAS]; Interacting selectively with a drug, any naturally occurring or synthetic substance, other than a nutrient, that, when administered or applied to an organism, affects the structure or functioning of the organism; in particular, any such substance used in the diagnosis, prevention, or treatment of disease [goid 8144] [pmid 10980448] [evidence IDA]; Interacting selectively with a drug, any naturally occurring or synthetic substance, other than a nutrient, that, when administered or applied to an organism, affects the structure or functioning of the organism; in particular, any such substance used in the diagnosis, prevention, or treatment of disease [goid 8144] [pmid 12204691] [evidence IDA]; Catalysis of the reaction: glycogen + phosphate = maltodextrin + alpha-D-glucose 1-phosphate [goid 8184] [pmid 9529348] [evidence IMP]; Catalysis of the reaction: glycogen + phosphate = maltodextrin + alpha-D-glucose 1-phosphate [goid 8184] [pmid 17705025] [evidence IMP]; Catalysis of the reaction: glycogen + phosphate = maltodextrin + alpha-D-glucose 1-phosphate [goid 8184] [pmid 10980448] [evidence IMP]; Interacting selectively with AMP, adenosine monophosphate [goid 16208] [pmid 10980448] [evidence IDA]; Interacting selectively with AMP, adenosine monophosphate [goid 16208] [pmid 10949035] [evidence IDA]; Catalysis of the transfer of a glycosyl group from one compound (donor) to another (acceptor) [goid 16757] [evidence IEA]; Interacting selectively with pyridoxal 5' phosphate, 3-hydroxy-5-(hydroxymethyl)-2-methyl4-pyridine carboxaldehyde 5' phosphate, the biologically active form of vitamin B6 [goid 30170] [evidence IEA]; Interacting selectively with bile acids, any of a group of steroid carboxylic acids occurring in bile [goid 32052] [pmid 12204691] [evidence IDA]; Interacting selectively with an identical protein to form a homodimer [goid 42803] [pmid 17705025] [evidence NAS]"