|Positive WB detected in||mouse brain tissue, C6 cells, U-251 cells|
|Positive IP detected in||mouse brain tissue|
|Positive IHC detected in||mouse brain tissue, human gliomas 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 in||mouse brain tissue|
|Western Blot (WB)||WB : 1:500-1:2000|
|Immunoprecipitation (IP)||IP : 0.5-4.0 ug for IP and 1:500-1:2000 for WB|
|Immunohistochemistry (IHC)||IHC : 1:20-1:200|
|Immunofluorescence (IF)||IF : 1:50-1:500|
|Sample-dependent, check data in validation data gallery|
The immunogen of 23935-1-AP is GFAP Fusion Protein expressed in E. coli.
|Tested Reactivity||human, mouse, rat|
|Cited Reactivity||human, macaques, mouse|
|Host / Isotype||Rabbit / IgG|
|Immunogen||GFAP fusion protein Ag20853|
|Full Name||glial fibrillary acidic protein|
|Calculated molecular weight||432 aa, 50 kDa|
|Observed molecular weight||45-50 kDa|
|GenBank accession number||BC013596|
|Gene ID (NCBI)||2670|
|Purification Method||Antigen affinity purification|
|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.|
GFAP (Glial fibrillary acidic protein) is a type III intermediate filament (IF) protein specific to the central nervous system (CNS). GFAP is one of the main components of the intermediate filament network in astrocytes and has been proposed as playing a role in cell migration, cell motility, maintaining mechanical strength, and in mitosis.
GFAP is expressed in central nervous system cells, predominantly in astrocytes. GFAP is commonly used as an astrocyte marker. However, GFAP is also present in peripheral glia and in non-CNS cells, including fibroblasts, chondrocytes, lymphocytes, and liver stellate cells (PMID: 21219963).
Involvement in disease
Mutations in GFAP lead to Alexander disease (OMIM: 203450), an autosomal dominant CNS disorder. The mutations present in affected individuals are thought to be gain-of-function.
Upregulation of GFAP is a hallmark of reactive astrocytes, in which GFAP is present in hypertrophic cellular processes. Reactive astrogliosis is present in many neurological disorders, such as stroke, various neurodegenerative diseases (including Alzheimer's and Parkinson's disease), and neurotrauma.
Astrocytes express 10 different isoforms of GFAP that differ in the rod and tail domains (PMID: 25726916), which means that they differ in molecular size. Isoform expression varies during the development and across different subtypes of astrocytes. Not all isoforms are upregulated in reactive astrocytes.
Intermediate filament proteins are regulated by phosphorylation. Six phosphorylation sites have been identified in GFAP protein, at least some of which are reported to control filament assembly (PMID: 21219963).
GFAP localizes to intermediate filaments and stains well in astrocyte cellular processes.
|Product Specific Protocols|
|WB protocol for GFAP antibody 23935-1-AP||Download protocol|
|IHC protocol for GFAP antibody 23935-1-AP||Download protocol|
|IF protocol for GFAP antibody 23935-1-AP||Download protocol|
|IP protocol for GFAP antibody 23935-1-AP||Download protocol|
|Click here to view our Standard Protocols|
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