Myosin Regulatory Light Chains, often abbreviated as MRLCs, are crucial components involved in muscle contraction. These small proteins play a significant role in regulating the activity of myosin, a motor protein responsible for muscle movement. Synonymous terms for MRLCs include "regulatory light chains of myosin", "myosin light chains", or simply "light chains". These synonyms are commonly used to refer to these important proteins in scientific literature and discussions. Understanding the various terms for Myosin Regulatory Light Chains is essential when investigating muscle physiology, as it enables effective communication and collaboration within the scientific community.