1. Abstract: Phospholamban (PLB) is a prominent regulator of myocardial contractility and a reversible inhibitor of the cardiac sarcoplasmic reticulum Ca2+ ATPase activity.
   受磷蛋白（phospholamban）是心肌收缩的一个重要调节因子，可抑制心肌肌浆网钙ATPase的活性、降低其对钙的亲和力。
2. In normal cardiac muscles, phospholamban can be phosphorylated at distinct sites by various protein kinases and release its inhibition to sarcoplasmic reticulum Ca2+ ATPase.
   正常情况下，受磷蛋白可被不同的蛋白激酶磷酸化从而解除其肌浆网钙ATPase的抑制作用。

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