Definition: The term "phosphoglucomutase" refers to a specific enzyme that catalyzes the conversion of pyruvate into glucose. This enzyme is an important part of the process by which cells produce energy through anaerobic respiration, and it plays a crucial role in the breakdown of carbohydrates for energy production. In simpler terms, phosphoglucomutase converts pyruvate, a form of sugar that comes from the breakdown of proteins or fats, into glucose.