Enables anion binding activity; carbohydrate binding activity; and glycogen phosphorylase activity. Involved in several processes, including glycogen catabolic process; response to cAMP; and response to hypoxia. Located in sarcoplasmic reticulum. Used to study cholestasis. Human ortholog(s) of this gene implicated in glycogen storage disease V. Orthologous to human PYGM (glycogen phosphorylase, muscle associated). [provided by Alliance of Genome Resources, Apr 2022]