SynaptoProbe® Red

Neuroscience Microscopy Cell membrane Synaptic vesicles

Cat. #	Quantity	Price	Lead time
3425-100ug	100 ug	–	in stock
3425-1mg	1 mg	$132	in stock
3425-5mg	5 mg	$350	in stock

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SynaptoProbe® Red is an analog of FM^®4-64, a widely used red fluorescent dye for studying synaptic activity in the synapses or neuromuscular junctions by staining synaptic vesicles.

This water-soluble and non-toxic to cells dye is nonfluorescent in an aqueous medium but becomes highly fluorescent after embedding into the outer leaflet of the cell membrane. When a neuron actively releases neurotransmitters, the dye becomes internalized within the recycled synaptic vesicles and stains the nerve terminals.

SynaptoProbe® Red can be used to visualize synaptic vesicles and their exocytosis and endocytosis in living neurons, identify actively firing neurons, and investigate the mechanisms of activity-dependent vesicle cycling. It is also helpful for the visualization of shear stress-induced plasma membrane damage in fibroblasts.

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Absorption and emission spectra of SynaptoProbe Red

General properties

Appearance:	dark powder
Molecular weight:	700.51
CAS number:	162112-35-8 (bromide salt)
IUPAC name:	4-{6-[4-(diethylamino)phenyl]hexa-1,3,5-trien-1-yl}-1-[3-(triethylammonio)propyl]pyridinium diiodide
Solubility:	good in water
Quality control:	NMR ¹H and HPLC-MS (95+%)
Storage conditions:	24 months after receival at -20°C in the dark. Transportation: at room temperature for up to 3 weeks. Desiccate.
MSDS:	Download
	Product specifications

Spectral properties

Excitation/absorption maximum, nm:	536
Emission maximum, nm:	736

FM® is the trademark of Molecular Probes

Product is offered and sold for research purposes only. Product is not tested for safety and efficacy in food, drug, medical device, cosmetic, no express or implied authorization to use for any other purpose, including, without limitation, in vitro diagnostic purposes, for humans or animals or for commercial purposes.