This is an XPP version of the classic KCa channel from Moczydlowski and Latorre 1983.
Moczydlowski E, Latorre R (1983) Gating kinetics of Ca2+-activated K+ channels from rat muscle incorporated into planar lipid bilayers. Evidence for two voltage-dependent Ca2+ binding reactions. J Gen Physiol 82:511-42 [PubMed]
Wang YJ, Lin MW, Lin AA, Wu SN (2008) Riluzole-induced block of voltage-gated Na+ current and activation of BKCa channels in cultured differentiated human skeletal muscle cells. Life Sci 82:11-20 [PubMed]