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Rhod-2 dextran conjugate *Low affinity with MW 3000*

Dextran-conjugated calcium indicators are stably retained within neurons. As a result, they are well suited to measuring presynaptic calcium at physiological temperatures. In addition, dextran indicators can be used to label neurons and their presynaptic boutons in vivo. This has allowed measurements of calcium in the presynaptic boutons of projection fibers that cannot be stably loaded with other types of indicators. Stephan D. Brenowitz and Wade G. Regehr reported a technique for in vivo loading of the climbing fiber projection to the cerebellum with Rhod 2-dextran indicators for presynaptic calcium imaging in brain slices. This technique is applicable to studies of projection fibers in many species from which brain slices can be prepared. The dextran indicators can be injected into the inferior olive using a stereotaxic device. This Rhod 2-dextran conjugate has low affinity with Kd = 3.8 uM.

Spectrum

Citations

View all 2 citations: Citation Explorer
A Lipid-Based Droplet Processor for Parallel Chemical Signals
Authors: Cazimoglu, Idil and Booth, Michael J and Bayley, Hagan
Journal: ACS nano (2021): 20214--20224
Tuning the Color Palette of Fluorescent Copper Sensors through Systematic Heteroatom Substitution at Rhodol Cores
Authors: Jia, Shang and Ramos-Torres, Karla M and Kolemen, Safacan and Ackerman, Cheri M and Chang, Christopher J
Journal: (2017)

References

View all 11 references: Citation Explorer
Microscopic imaging of intracellular calcium in live cells using lifetime-based ratiometric measurements of Oregon Green BAPTA-1
Authors: Lattarulo C, Thyssen D, Kuchibholta KV, Hyman BT, Bacskaiq BJ.
Journal: Methods Mol Biol (2011): 377
An ensemble and single-molecule fluorescence spectroscopy investigation of Calcium Green 1, a calcium-ion sensor
Authors: Lu Y, Paige MF.
Journal: J Fluoresc (2007): 739
Calcium Green FlAsH as a genetically targeted small-molecule calcium indicator
Authors: Tour O, Adams SR, Kerr RA, Meijer RM, Sejnowski TJ, Tsien RW, Tsien RY.
Journal: Nat Chem Biol (2007): 423
Measurement of intracellular calcium levels by the fluorescent Ca2+ indicator Calcium-Green
Authors: Silei V, Fabrizi C, Venturini G, Tagliavini F, Salmona M, Bugiani O, Lauro GM.
Journal: Brain Res Brain Res Protoc (2000): 132
Optical imaging of neuronal activity in tissue labeled by retrograde transport of Calcium Green Dextran
Authors: McPherson DR, McClellan AD, O'Donovan MJ.
Journal: Brain Res Brain Res Protoc (1997): 157
Page updated on July 12, 2023

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Catalog Number20450
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Physical properties

Molecular weight

~4000

Solvent

Water

Spectral properties

Excitation (nm)

553

Emission (nm)

577

Quantum yield

0.11

Storage, safety and handling

H-phraseH303, H313, H333
Hazard symbolXN
Intended useResearch Use Only (RUO)
R-phraseR20, R21, R22

Storage

Freeze (< -15 °C); Minimize light exposure
UNSPSC12352200
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