label: Reduced muscle glycogen phosphorylase activity
label_lc: reduced muscle glycogen phosphorylase activity
description: "Activity of the enzyme glycogen phosphorylase in muscle tissue is below the lower limit of normal. Glycogen phosphorylase (EC 2.4.1.1) is also known as amylophosphorylase, muscle phosphorylase a and b, polyphosphorylase, and myophosphorylase."