Mrf4 is a gene that plays a crucial role in the development of muscle tissue in animals. It encodes a protein that is part of the myogenic regulatory factor family, which is essential for muscle cell differentiation and growth. This gene is particularly important during embryonic development, as it helps regulate the formation of skeletal muscles. In addition to its role in muscle development, Mrf4 is also involved in the maintenance of muscle mass in adults. It interacts with other proteins and genes to ensure proper muscle function and repair. Mutations or disruptions in Mrf4 can lead to muscle-related disorders and affect overall muscle health.