CATSPER2 GI:26051227 sperm-associated cation channel 2 isoform 4 1 maayqqeeqm qlpradairs rlidtfslie hlqglsqavp rhtirelldp 50 51 srqkklvlgd qhqlvrfsik pqrieqisha qrllsrlhvr csqrpplslw 100 101 agwvlecplf knfiiflvfl ntiilmveie llestntklw plkltlevaa 150 151 wfillifile illkwlsnfs vfwksawnvf dfvvtmlvri eilrvrlvg