Wiktionary
phospholamban
n. (context biochemistry English) A protein that regulates the Ca2+ pump in cardiac muscle and skeletal muscle cells.
Wikipedia
Phospholamban
Phospholamban, also known as PLN or PLB, is a protein that in humans is encoded by the PLN gene. Phospholamban is a 52- amino acid integral membrane protein that regulates the Ca pump in cardiac muscle and skeletal muscle cells.