“…The generation, expression patterns and characteristics of SyG37 transgenic mice incorporating a SyGCaMP2‐mCherry transgene have already been described in detail (Al‐Osta et al, ). Briefly, SyGCaMP2‐mCherry was created by fusing mCherry to the C‐terminus of SyGCaMP2, which is, in turn, a fusion of GCaMP2 to the C‐terminus of synaptophysin‐1 (Dreosti, Odermatt, Dorostkar, & Lagnado, ).…”