Description
General description
Microtubule Associated Proteins, or MAPS, bind to the tubulin subunits of microtubule structures and regulate their functional stability. In the cell MAPs bind to monomer and multimerized tubulin. MAP binding to multimerized tubulin further stabilizes the formation of higher order microtubulin structures. MAP binding to microtubule structures is mediated through phosporylation through Microtubule Affinity Regulated Kinase (MARK). Phosphorylation releases MAPs bound to microtubules, destabilizing the structure, driving it toward disassembly. There are predominately two MAP types, I, II. Type II MAP includes MAP2, MAP4, and tau and are found in nervous tissue. Six tau isoforms exist in brain tissue, and they are distinguished by their number of binding domains. Three isoforms have three binding domains and the other three have four binding domains. The binding domains are located in the carboxy-terminus of the protein and are positively-charged (allowing it to bind to the negatively-charged microtubule). The isoforms with four binding domains are better at stabilizing microtubules than those with three binding domains.
~68-72 kDa
Immunogen
Bovine thyroglobulin-conjugated synthetic peptide corresponding to amino acids 275-291 (VQIINKKLDLSNVQSKC) of human Tau (4-repeat isoform RD4). Region is flanking junction coded by adjacent exons 9 & 11 with the inclusion of exon 10. The immunizing sequence is identical in human, rat, mouse and bovine.
Application
Immunohistochemistry:
This antibody has been reported by an independent laboratory to detect Tau (4-repeat isoform RD4) in autoclaved paraffin brain sections. (De Silva, R., 2003;Togo, T., 2002)
Differential Detection of Tauopathies: (Togo, T., 2002)
Research Category
Neuroscience
Research Sub Category
Kinases & Phosphatases
Neurodegenerative Diseases
This Anti-Tau (4-repeat isoform RD4) Antibody, clone 1E1/A6 is validated for use in IH, WB for the detection of Tau (4-repeat isoform RD4).
Biochem/physiol Actions
Cross-reactivity with mouse and bovine expected due to sequence homology.
Recognizes Tau (4-repeat isoform RD4), Mr 45-65 kDa. Higher MW band (68-72 kDa) represents phosphorylated Tau.
Physical form
Mouse monoclonal cultured supernatant containing 0.05% sodium azide.
Frozen at -20°C.
Unpurified
Preparation Note
Stable for 1 year at -20°C from date of receipt.
Handling Recommendations: Upon first thaw, and prior to removing the cap, centrifuge the vial and gently mix the solution. Aliquot into microcentrifuge tubes and store at -20°C. Avoid repeated freeze/thaw cycles, which may damage IgG and affect product performance. Note: Variabillity in freezer temperatures below -20°C may cause glycerol containing solutions to become frozen during storage.
Analysis Note
Control
Rat brain cytosolic fraction.
Routinely evaluated by western blot on rat brain cytosol fraction.
Western Blot Analysis:
A 1:1,000-1:10,000 dilution of this lot detected Tau (4-repeat isoform RD4) in a rat brain cytosolic fraction.
Other Notes
Concentration: Please refer to the Certificate of Analysis for the lot-specific concentration.
Legal Information
UPSTATE is a registered trademark of Merck KGaA, Darmstadt, Germany
Disclaimer
Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.
