Associated products


Our Abpromise guarantee covers the use of ab12419 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

  • Applications

    Blocking - Blocking peptide for Anti-PSD95 antibody (ab12093)

  • Form

  • Additional notes

    - First try to dissolve a small amount of peptide in either water or buffer. The more charged residues on a peptide, the more soluble it is in aqueous solutions.
    - If the peptide doesn’t dissolve try an organic solvent e.g. DMSO, then dilute using water or buffer.
    - Consider that any solvent used must be compatible with your assay. If a peptide does not dissolve and you need to recover it, lyophilise to remove the solvent.
    - Gentle warming and sonication can effectively aid peptide solubilisation. If the solution is cloudy or has gelled the peptide may be in suspension rather than solubilised.
    - Peptides containing cysteine are easily oxidised, so should be prepared in solution just prior to use.

  • Concentration information loading...

Preparation and Storage

  • Stability and Storage

    Shipped at 4°C. Upon delivery aliquot and store at -20°C or -80°C. Avoid repeated freeze / thaw cycles.

    Information available upon request.

General Info

  • Alternative names

    • Discs large homolog 4
    • Disks large homolog 4
    • DLG 4
    • Dlg4
    • DLG4_HUMAN
    • FLJ97752
    • FLJ98574
    • Human post synaptic density protein 95
    • Post synaptic density protein 95
    • Postsynaptic density protein 95
    • PSD 95
    • PSD-95
    • PSD95
    • SAP 90
    • SAP-90
    • SAP90
    • Synapse associated protein 90
    • Synapse-associated protein 90
    • Tax interaction protein 15
    see all
  • Function

    Interacts with the cytoplasmic tail of NMDA receptor subunits and shaker-type potassium channels. Required for synaptic plasticity associated with NMDA receptor signaling. Overexpression or depletion of DLG4 changes the ratio of excitatory to inhibitory synapses in hippocampal neurons. May reduce the amplitude of ASIC3 acid-evoked currents by retaining the channel intracellularly. May regulate the intracellular trafficking of ADR1B.
  • Tissue specificity

  • Sequence similarities

    Belongs to the MAGUK family.
    Contains 1 guanylate kinase-like domain.
    Contains 3 PDZ (DHR) domains.
    Contains 1 SH3 domain.
  • Domain

    The PDZ domain 3 mediates interaction with ADR1B.
    The L27 domain near the N-terminus of isoform 2 is required for HGS/HRS-dependent targeting to postsynaptic density.
  • Post-translational

    Palmitoylation of isoform 1 is required for targeting to postsynaptic density.
  • Cellular localization

    Cell membrane. Cell junction, synapse, postsynaptic cell membrane, postsynaptic density. Cell projection, axon. Cell junction, synapse. High levels in postsynaptic density of neurons in the forebrain. Also in presynaptic region of inhibitory synapses formed by cerebellar basket cells on axon hillocks of Purkinje cells.
  • Information by UniProt


  • PSD95 (ab12093) western blot on mouse brain extract (10µg protein/lane), showing use of the immunising peptide (ab12419) as a control. The blot was exposed for 10 seconds to autoradiographic film.

    Lane 1 = 0.3µg ab12093
    Lane 2 = 1µg ab12093
    Lane 3 = 3µg ab12093
    Lane 4 = 3µg ab12093 + 1µg peptide
    Lane 5 = Ladder


ab12419 has not yet been referenced specifically in any publications.

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