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Product overview

  • Name
  • Short description
    RuBi - caged glutamate compound. Water soluble.
  • Biological description

    Ruthenium-bipyridine-trimethylphosphine (RuBi) - caged glutamate. Water soluble.

    RuBi-Glutamate can be excited by visible wavelengths and releases glutamate after one- or two- photon excitation. Glutamate release occurs in less than 50 ns.
    Displays fewer non-specific effects than MNI-caged-Glutamate.

    RuBi-Glutamate has a relatively high absorption cross section in the visible (blue) and has a high quantum efficiency of uncaging which allows use at low concentrations (e.g. lower concentrations than MNI-Glu). This partly avoids blockade of GABAergic transmission which occurs with other caged compounds.

    Two-photon uncaging of RuBi-Glutamate has a high spatial resolution and generates excitatory responses in individual dendritic spines with physiological kinetics. With laser beam multiplexing, two-photon RuBi-Glutamate uncaging can also be used to depolarize and fire pyramidal neurons with single-cell resolution.

    Therefore, RuBi-Glutamate enables photoactivation of neuronal dendrites and circuits with visible or two-photon light sources at single cell and single spine precision.

    When combined with RuBi-Glutamate uncaging, two-photon photostimulation can be applied to optically map inhibitory connections.

  • Alternative names
    RuBi-Glu, RuBIglutamate
  • Biological action
    Caged compound
  • Citations


  • Chemical name
    (bis(2,2'-Bipyridine-N,N')trimethylphosphine)-(S)-1-aminopropane-1,3-dicarboxylic acid ruthenium(2+) complex sodium hexafluorophosphate salt
  • Molecular Weight
  • Chemical structure
  • Molecular Formula
  • PubChem identifier
  • Source
  • InChiKey
  • Appearance
    Orange solid

Storing and Using Your Product

  • Storage instructions
  • Solubility overview
    Soluble in water (20mM)
  • Handling
    This compound is light sensitive; exposure to light may affect compound performance. We therefore recommend storing the material in the dark and protecting from light.
  • Important
    This product is for RESEARCH USE ONLY and is not intended for therapeutic or diagnostic use. Not for human or veterinary use.

References for RuBi-Glutamate

  • RuBi-Glutamate: Two-Photon and Visible-Light Photoactivation of Neurons and Dendritic spines.

    Fino E et al (2009) Front Neural Circuits 3 : 2
    PubMedID: 19506708
  • A fast ruthenium polypyridine cage complex photoreleases glutamate with visible or IR light in one and two photon regimes.

    Salierno M et al (2010) J Inorg Biochem 104(4) : 418-22.
    PubMedID: 20060592
  • Dense, unspecific connectivity of neocortical parvalbumin-positive interneurons: a canonical microcircuit for inhibition?

    Packer AM et al (2011) J Neurosci 31(37) : 13260-71.
    PubMedID: 21917809
  • Dense inhibitory connectivity in neocortex.

    Fino and Yuste (2011) Neuron. 69(6) : 1188-203.
    PubMedID: 21435562
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