Heterotrimer: blocks the voltage-dependent L-type calcium channels from the heart, and the small conductance calcium-activated potassium channels in the chromaffin cells and in the brain. Is very toxic to mice. Monomer: Snake venom phospholipase A2 (PLA2) that has neurotoxic activities. Voltage-dependently affects ionic currents in chick (Gallus domesticus) dorsal root ganglion cells. PLA2 catalyzes the calcium-dependent hydrolysis of the 2-acyl groups in 3-sn-phosphoglycerides. a 1,2-diacyl-sn-glycero-3-phosphocholine + H2O = a 1-acyl-sn-glycero-3-phosphocholine + a fatty acid + H(+) Binds 1 Ca(2+) ion. Heterotrimer composed of an alpha-neurotoxin-like peptide of 8 kDa (AC P0CJ35), this neurotoxic phospholipase of 16 kDa and a serine protease inhibitor of 7 kDa (AC B7S4N9) at an approximate stoichiometry of 1:1:4; non-covalently linked. Expressed by the venom gland. Contains 7 disulfide bonds. Monomer: LD(50) is 500 ug/kg when injected into mice. Heterotrimer: LD(50) is 50-100 ug/kg when injected into mice. Belongs to the phospholipase A2 family. Group I subfamily. Taicatoxin entry