多选题In the early 1990s, which is the best way to identify which protein is specifically cleft by botulinum toxin?A、 SDS-PAGEB、 Western blotC、 Expression cloningD、 Sequence alignment简答题Which sequence of events that underlie neurotransmission is correct? a. Neurotransmitter release b. Ca2+ entry into the presynaptic terminal c. Axonal action potential d. Fusion of synaptic vesicle with the presynaptic plasma membrane e. Opening of voltage-gated Ca2+ channels f. Depolarization of the presynaptic terminalA、 abcdef B、 cfebdaC、 fcebdaD、 cfbeda多选题Neurotransmitter release is mainly triggered by which ion?A、 SodiumB、 ChlorideC、 PotassiumD、 Calcium多选题What is quantal release of neurotransmitter?A、 Release of neurotransmitter in discrete unitsB、 Release of one neurotransmitter molecule at a timeC、 Release of transmitter onto extra-synaptic receptors多选题Which calcium indicator is ratiometric dye?A、 Fluo3B、 Fluo4C、 Furo2D、 GCAMP