Targeted ablation of plasma membrane Ca2+-ATPase (PMCA) 1 and 4 indicates a major housekeeping function for PMCA1 and a critical role in hyperactivated sperm motility and male fertility for PMCA4. - Okunade GW; Miller ML; Pyne GJ; Sutliff RL; O'Connor KT; Neumann JC; Andringa A; Miller DA; Prasad V; Doetschman T; Paul RJ; Shull GE (The Journal of biological chemistry, 2004)