Complex sentence: Isopimaric acid (IPA) is a toxin which acts as a large conductance Ca 2 + activated K + channel (BK channel) opener (Kaczorowski et al.1996, Imaizumi et al.2002).
Split into simpler sentences: Isopimaric acid (IPA) is a toxin which acts as a large conductance Ca 2 +-activated K + channel (BK channel) opener. IPA acts on the large-conductance calcium activated K + channels (BK channels) (Kaczorowski et al.1996, Imaizumi et al.2002).