Physiological role of the alpha1- and alpha2-isoforms of the Na+-K+-ATPase and biological significance of their cardiac glycoside binding site. - Dostanic-Larson I; Lorenz JN; Van Huysse JW; Neumann JC; Moseley AE; Lingrel JB (American journal of physiology. Regulatory, integrative and comparative physiology, 2006)