A: Indirect immunolabeling of 3T3 cells (dilution 1 : 500). Nuclei were visualized by DAPI staining. B: Indirect immunolabeling of hippocampus neurons (dilution 1 : 500; red). Synaptic terminals were visualized with a primary labeled monoclonal synaptotagmin 1 antibody (cat. no. 105 311C5, dilution 1 : 300; green).