胚胎时期，肌球蛋白调节性轻链 2（myosin regulatory light chain，MYL2）在心脏的发育与功能方面扮演着重要角色。MYL2 （也称 MLC2）的基因突变与肥厚型心肌病有关。MYL2 突变可影响肌球蛋白的结构和功能，导致肥厚型心肌病、扩张型心肌病甚至慢 性心力衰竭的发生。同时，MYL2 的磷酸化在心肌收缩、心室扭转、心脏功能和疾病方面也发挥着重要作用。

 In the embryonic period, myosin regulatory light chain (MYL2) plays a pivotal role in the development and function of the heart. A large number of studies have previously confirmed that the mutation of MYL2 gene, also known as MLC2, confers intimate associations with hypertrophic cardiomyopathy. MYL2 gene mutation impacts the structure and function of myosin, thereby leading to the occurrence and progression of hypertrophic and dilated cardiomyopathy as well as the following chronic heart failure. Importantly, MYL2 phosphorylation renders crucial effects in the processes of cardiac contraction, ventricular torsion and cardiac function.