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IBA1 Polyclonal antibody

IBA1 Polyclonal Antibody for IF, FC, IHC, ELISA

Host / Isotype

Rabbit / IgG


human, mouse, rat and More (4)





Cat no : 10904-1-AP


AIF 1, AIF1, G1, IBA1, IRT 1, Protein G1

Tested Applications

Positive WB detected inTHP-1 cells
Positive IP detected inTHP-1 cells
Positive IHC detected inrat brain tissue, human tonsillitis tissue, human liver tissue, mouse brain tissue, human 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 detected inmouse brain tissue, rat brain tissue
Positive FC detected inTHP-1 cells

Recommended dilution

Western Blot (WB)WB : 1:500-1:2000
Immunoprecipitation (IP)IP : 0.5-4.0 ug for 1.0-3.0 mg of total protein lysate
Immunohistochemistry (IHC)IHC : 1:400-1:1600
Immunofluorescence (IF)IF : 1:50-1:500
Flow Cytometry (FC)FC : 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

10904-1-AP targets IBA1 in IF, FC, IHC, ELISA applications and shows reactivity with human, mouse, rat samples.

Tested Reactivity human, mouse, rat
Cited Reactivityhuman, mouse, rat, sheep, zebrafish, hamster, pig
Host / Isotype Rabbit / IgG
Class Polyclonal
Type Antibody
Immunogen IBA1 fusion protein Ag1363
Full Name allograft inflammatory factor 1
Calculated Molecular Weight 17 kDa
GenBank Accession NumberBC009474
Gene Symbol AIF1
Gene ID (NCBI) 199
Conjugate Unconjugated
Form Liquid
Purification MethodAntigen affinity purification
Storage Buffer PBS with 0.02% sodium azide and 50% glycerol pH 7.3.
Storage ConditionsStore at -20°C. Stable for one year after shipment. Aliquoting is unnecessary for -20oC storage. 20ul sizes contain 0.1% BSA.

Background Information

What is the molecular weight of IBA1?

The molecular weight of IBA1 is 16.7 kD.

 What is IBA1?

Ionized calcium-binding adaptor molecule 1 (IBA1), also known as Allograft inflammatory factor-1 (AIF-1), is an inflammation-responsive scaffold protein expressed and secreted from macrophages. Microglia response factor (MRF-1) and daintain are also similar, and likely identical, proteins (PMIDs: 29749461, 9630473, 23792284).

 What is the function of IBA1?

IBA1 is necessary for macrophage survival, and it is also a key molecule in proinflammatory activity (PMID: 29749461).

 Where is IBA1 localized?

IBA1 is a cytoplasmic protein, often expressed in immunocytes, macrophages, and microglia. It can be used as a marker for normal (not 'dark') microglia in brain tissue, as IBA1 is expressed by all microglial cell subpopulations (PMIDs: 29749461, 11943136, 26847266, 9630473).

 Is IBA1 upregulated in active immunophages?

Yes; its expression is associated with inflammatory activity (PMID: 29749461).

 How do IBA1-positive microglia differ from microglia that express less or no IBA1?

'Dark' microglia is a recently described phenotype associated with Alzheimer's disease pathology and chronic stress; these dark microglia express decreased IBA1 (often punctiform), and show distinct ultrastructural differences from 'normal' microglia as well as condensed and electron-dense cytoplasm and nucleoplasm. Normal microglia generally display strong, diffuse expression of IBA1. IBA1-positive microglial processes in normal conditions also have a strong tendency to exclusively contact synaptic elements, such as axon terminals, dendritic spines, and synaptic clefts (PMIDs: 29992181, 26847266).

 How is IBA1 related to Alzheimer's disease and pain?

Exacerbated immunoactivity of IBA1, particularly in proximity to amyloid plaques, is prominently featured in AD pathology. IBA1, along with other microglial markers, are also associated with pain, and robust microglial reactions often follow spinal cord injury (PMIDs: 29992181, 23792284).


Product Specific Protocols
WB protocol for IBA1 antibody 10904-1-APDownload protocol
IHC protocol for IBA1 antibody 10904-1-APDownload protocol
IF protocol for IBA1 antibody 10904-1-APDownload protocol
IP protocol for IBA1 antibody 10904-1-APDownload protocol
Standard Protocols
Click here to view our Standard Protocols



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MMP13 inhibition rescues cognitive decline in Alzheimer transgenic mice via BACE1 regulation.

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Neuroinflammation in a Rat Model of Tourette Syndrome.

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The reviews below have been submitted by verified Proteintech customers who received an incentive forproviding their feedback.


Reyes (Verified Customer) (04-05-2024)

Iba1 (in green) marks clearly my microglia in human brain FFPE cortex.

  • Applications: Immunofluorescence
  • Primary Antibody Dilution: 1:100
  • Cell Tissue Type: Human Brain Cortex
IBA1 Antibody Immunofluorescence validation (1:100 dilution) in Human Brain Cortex (Cat no:10904-1-AP)

Alexandru (Verified Customer) (11-13-2023)

Very pleased with the antibody! I had a claer signal in all my stains.

  • Applications: Immunofluorescence
  • Primary Antibody Dilution: 1:150
  • Cell Tissue Type: Mouse ventricle

NX (Verified Customer) (02-27-2023)

A clean antibody to detect endogenous Iba1 from mouse brain lysate.

  • Applications: Western Blot
  • Primary Antibody Dilution: 1:500
  • Cell Tissue Type: mouse brain lysate