Enkephalins increase cyclic adenosine monophosphate content, calcium uptake, and contractile state in cultured chick embryo heart cells
Laurent S, Marsh JD, Smith TW. Enkephalins increase cyclic adenosine monophosphate content, calcium uptake, and contractile state in cultured chick embryo heart cells. J Clin Invest. 1986; 77(5):1436 - 1440.