Tested Applications
| Positive WB detected in | mouse brain tissue, HeLa cells, rat brain tissue |
| Positive IHC detected in | mouse brain tissue Note: suggested antigen retrieval with TE buffer pH 9.0; (*) Alternatively, antigen retrieval may be performed with citrate buffer pH 6.0 |
| Positive IF-P detected in | mouse brain tissue |
| Positive FC (Intra) detected in | Neuro-2a cells |
Recommended dilution
| Application | Dilution |
|---|---|
| Western Blot (WB) | WB : 1:5000-1:50000 |
| Immunohistochemistry (IHC) | IHC : 1:200-1:800 |
| Immunofluorescence (IF)-P | IF-P : 1:200-1:800 |
| Flow Cytometry (FC) (INTRA) | FC (INTRA) : 0.40 ug per 10^6 cells in a 100 µl suspension |
| It is recommended that this reagent should be titrated in each testing system to obtain optimal results. | |
| Sample-dependent, Check data in validation data gallery. | |
Product Information
20665-1-AP targets PSD95-Specific in WB, IHC, IF-P, FC (Intra), IP, CoIP, ELISA applications and shows reactivity with human, mouse, rat samples.
| Tested Reactivity | human, mouse, rat |
| Cited Reactivity | human, mouse, rat, canine, chicken, zebrafish, hamster |
| Host / Isotype | Rabbit / IgG |
| Class | Polyclonal |
| Type | Antibody |
| Immunogen |
Peptide Predict reactive species |
| Full Name | discs, large homolog 4 (Drosophila) |
| Calculated Molecular Weight | 85 kDa |
| Observed Molecular Weight | 90-95 kDa |
| GenBank Accession Number | NM_001365 |
| Gene Symbol | PSD95 |
| Gene ID (NCBI) | 1742 |
| RRID | AB_2687961 |
| Conjugate | Unconjugated |
| Form | Liquid |
| Purification Method | Antigen affinity purification |
| UNIPROT ID | P78352 |
| Storage Buffer | PBS with 0.02% sodium azide and 50% glycerol, pH 7.3. |
| Storage Conditions | Store at -20°C. Stable for one year after shipment. Aliquoting is unnecessary for -20oC storage. 20ul sizes contain 0.1% BSA. |
Background Information
PSD-95 (postsynaptic density protein 95) also known as SAP-90 (synapse-associated protein 90) is a protein that in humans is encoded by the DLG4 (disks large homolog 4) gene. PSD-95 is a scaffolding protein of the MAGUK protein family, and engages in several vital protein-protein interactions in the brain with its PDZ domains. It has been suggested that PSD-95 is composed of two supramodules, one of which is the PDZ1-2 tandem domain. It plays an important role in synaptic plasticity and the stabilization of synaptic changes during long-term potentiation. Observed MW of PSD95 is 90-95 kDa due to phosphorylation (PMID: 20682303).
Protocols
| Product Specific Protocols | |
|---|---|
| FC protocol for PSD95-Specific antibody 20665-1-AP | Download protocol |
| IF protocol for PSD95-Specific antibody 20665-1-AP | Download protocol |
| IHC protocol for PSD95-Specific antibody 20665-1-AP | Download protocol |
| WB protocol for PSD95-Specific antibody 20665-1-AP | Download protocol |
| Standard Protocols | |
|---|---|
| Click here to view our Standard Protocols |
Publications
What published studies show
The PSD95-specific polyclonal antibody (Cat# 20665-1-AP) has accumulated 389 citations published in journals including Nature Neuroscience, Neuron, Nature Communications, Science Advances, Molecular Psychiatry, Alzheimer's & Dementia, Redox Biology, and Journal of Ethnopharmacology. Research fields covered include synaptic plasticity, neurodegeneration (Alzheimer's, Parkinson's, Huntington's disease), neuroinflammation, depression, cognitive impairment, autism spectrum disorder, epilepsy, stroke, environmental neurotoxicity, and gut-brain axis interactions.
| Species | Application | Title |
|---|---|---|
Cell Metab Gut bacteria-driven homovanillic acid alleviates depression by modulating synaptic integrity | ||
Bioact Mater Construction of functional neural network tissue combining CBD-NT3-modified linear-ordered collagen scaffold and TrkC-modified iPSC-derived neural stem cells for spinal cord injury repair | ||
Bioact Mater Bioengineering an improved three-dimensional vascularized co-culture model for studying Neuron-Microglia interactions. | ||
J Extracell Vesicles Nose-to-Brain Delivery of Chlorella vulgaris Extracellular Vesicles for Antidepressant Effects. | ||
Nat Neurosci The mitochondrial unfolded protein response in human microglia disrupts neuronal-glial communication and promotes senescence. | ||
Nat Neurosci Foxp2 controls synaptic wiring of corticostriatal circuits and vocal communication by opposing Mef2c. |
Reviews
What customers say
Across 5 reviews (average ~4/5), users primarily tested this PSD95 antibody by Western Blot and IHC in mouse tissues and neurons. Most found it reliable for detecting the expected ~100 kDa band in mouse brain at 1:1000–1:2000 dilution. However, two reviewers noted non-specific bands in other mouse cell lines and iPSC-derived neurons, raising specificity concerns. Overall, it performs well for routine WB in CNS samples but may require optimization or a more specific clone for applications demanding high selectivity.
The reviews below have been submitted by verified Proteintech customers who received an incentive for providing their feedback.
Zakia (Verified Customer) (12-04-2025) | I used the PSD95 rabbit antibody on mice brain lysate, and overall it performed well. The antibody detected PSD95 reliably without major non-specific band, making it suitable for routine western blot experiments.
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Olga (Verified Customer) (09-12-2025) | The band of right size is present in mouse brain, however, there are lots of non-specific parasite bands in other mouse cells and tissues.
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Tatyana (Verified Customer) (03-11-2023) | Works well in IHC and WB in mouse brain. WB: 4% milk in TBST and semi-dry transfer; detects a double band at ~100kDa. IHC: 4% PFA fixed and paraffinized sections; standard antigen retrieval and DAB detection. Used at 1:1000, with incubation overnight at 4C.
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Lisa (Verified Customer) (03-17-2022) | The antibody works well for WB
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James (Verified Customer) (09-29-2021) | Antibody was not as specific as I had hoped. I used the antibody at 1:1000, I detected a band at 95kDa which is PSD-95, however, other bands were also detected. I will be looking to purchase a more specific monoclonal antibody for my next experiments as the specificity is an issue for me.
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