BioTracker synaptic dyes are a series of fluorescent cationic styryl dyes developed to follow synaptic activities at neuromuscular junctions or synapses. These dyes typically have a lipophilic tail at one end and a highly hydrophilic at the other end. In the presence of cells or tissue preparations, the dyes partition between the aqueous phase, where the dyes are virtually non-fluorescent, and the outer leaflet of the cell surface membranes, where the dyes insert the lipophilic end into the membranes and become intensely fluorescent. During endocytosis following nerve stimulation, the dyes become trapped inside the vesicles. Thus, after washing off the dyes on the cell surface, the fluorescent signal is proportional to the number of newly formed vesicles. On the other hand, during exocytosis, the dyes are released from the vesicles along with neurotransmitters, causing a decrease in fluorescent signal. As a result, the change in fluorescent intensity reflects the amount of endocytosis/exocytosis or synaptic activity.BioTracker 510 Green C2(FM2-10) Synaptic Dye is more water soluble than BioTracker 510 Green C4(FM1-43) Synaptic Dye and thus has a faster de-staining rate.Spectral PropertiesAbsorbance (MeOH): 510 nmEmission (MeOH): 625 nmAbsorbance (Membranes): 480 nmEmission (Membranes): 600 nm，官网链接：https://www.sigmaaldrich.cn/product/mm/sct132 默克 科研、开发、生产。 作为生命科学行业的全球领先供应商，我们致力于为科研、生物技术开发和生产，以及制药药物疗法开发和生产提供各类解决方案和服务。

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