Samigullin, D. V., Khaziev, E. F., Zhilyakov, N. V., Bukharaeva, E. A., Nikolsky, E. E. Loading a Calcium Dye into Frog Nerve Endings Through the Nerve Stump: Calcium Transient Registration in the Frog Neuromuscular Junction. J. Vis. Exp. (125), e55122, doi:10.3791/55122 (2017).