MYLK (Myosin Light Chain Kinase): MYLK is a gene that encodes an enzyme essential for smooth muscle contraction. It phosphorylates myosin light chains, enabling actin-myosin interaction, and plays a key role in regulating vascular tone and blood pressure. MYLK also contributes to other smooth muscle functions, including gastrointestinal motility and airway resistance. Changes in MYLK function or expression have been linked to conditions such as asthma, hypertension, and certain cancers.