7-NI 7-Nitroindazole BM Basal medium Ca2+ Calcium cGMP Cyclic guanosine monophosphate CM Complete medium CN238 RP-8-Br-pMe-PET-cGMPS DAPI 4′,6-diamidino-2-phenylindole DMSO Dimethyl Sulfoxide eNOS Endothelial nitric oxide synthase GCL Ganglion cell layer INL Inner nuclear layer K+ Potassium ion KCNA Potassium voltage-gated channel subfamily A Kv Voltage-gated potassium channels MrgX Margatoxin NADPH Nicotinamide adenine dinucleotide phosphate nNOS Neuronal nitric oxide synthase NO Nitric...