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Anti-phospho-Tau (Ser235) Antibody, clone RN235

clone RN235, from mouse

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Microtubule-associated protein tau, Neurofibrillary tangle protein, Paired helical filament-tau, PHF-tau

biological source


antibody form

purified immunoglobulin

antibody product type

primary antibodies


RN235, monoclonal

species reactivity

mouse, human


antibody small pack of 25 μg


ELISA: suitable
dot blot: suitable
immunofluorescence: suitable
immunohistochemistry: suitable (paraffin)
western blot: suitable



NCBI accession no.

UniProt accession no.

target post-translational modification

phosphorylation (pSer235)

Gene Information

human ... MAPT(4137)

General description

Microtubule-associated protein tau (UniProt: P10636; also known as Neurofibrillary tangle protein, Paired helical filament-tau, PHF-tau) is encoded by the MAPT (also known as MAPTL, MTBT1, TAU) gene (Gene ID: 4137) in human. Tau, a highly asymmetric and heat-stable protein, is expressed mainly in the brain, where it regulates the stability and orientation of microtubules in neurons, astrocytes, and oligodendrocytes. Tau protein is reported to be the predominant component of the paired helical filaments (PHFs) and neurofibrillary tangles (NFTs) that are characteristic of pathological brain lesions in Alzheimer s disease. The dephosphorylation of Tau protein promotes rapid and extensive microtubule polymerization, while the phosphorylation of Tau decreases its ability to promote microtubule assembly. Tau is a substrate for a multitude of protein kinases, including CaM kinase II, casein kinase II, protein kinase A (PKA), MAP kinase (ERK2), Cdk5/ p35, and glycogen synthase kinase-3 (GSK-3) and is phosphorylated at many different sites in Alzheimer s disease brain. It is believed that the phosphorylation of specific sites, rather than the overall extent of phosphorylation, is important in modulating the ability of Tau to bind microtubules and promote microtubule assembly. This antibody (clone RN235) specifically reacts with tau phosphorylated at serine 235, and detects intraneuronal NFTs (iNFTs), and extraneuronal NFTs (eNFTs) in the brain tissue. Although theoretically it can also react with phospho Thr231, but EC50 is very high compared to reactivity with phospho Ser235 (407 nM vs 0.61 nM). (Ref.: Brici, D., et al. (2018). J. Alzheimer s Dis. 61(3); 899-905).


Clone RN235 is a mouse monoclonal antibody that detects microtubule-associated protein tau (MAPT) phosphorylated on serine 235 of isoform Tau-C. It targets an epitope with in 12 amino acids surround pSer235. This sequence is also conserved in isoform Tau-F.


KLH-conjugated linear peptide corresponding to 12 amino acids surrounding phospho serine 235 of human tau-C.


Anti-phospho-Tau (Ser235), clone RN235, Cat. No. MABN2275, is a highly specific mouse monoclonal antibody that targets Microtubule-associated protein tau and has been tested for use in Dot Blot, ELISA, Immunohistochemistry (Paraffin), Immunofluorescence, and Western Blotting.
Immunohistochemistry (Paraffin) Analysis: A 1:500 dilution from a representative lot detected phospho-tau (Ser235) in human Alzheimer′s diseas (AD) brain tissue sections.

Dot Blot analysis: A representative lot detected phosphorylated recombinant human tau (pSer235), but not the non-phosphorylated recombinant human tau (Tau). (Courtesy of Rebecca Nisbet, Ph.D., University of Queensland, Brisbane, Austraila).

Immunofluorescence Analysis: A representative lot detected phospho-tau (Ser235) in K3 and rTg4510 tau transgenic mouse brains (Courtesy of Rebecca Nisbet, Ph.D., University of Queensland, Brisbane, Austraila).

Immunohistochemistry (Paraffin) Analysis: A representative lot detected phospho-Tau (Ser235) in human Alzheimer s disease (AD) brain tissue sections. (Courtesy of Rebecca Nisbet, Ph.D., University of Queensland, Brisbane, Austraila).

ELISA Analysis: A representative lot full-length human recombinant phospho-tau (Ser235) or GSK-3 beta phosphorylated tau (pTau), but not the non-phosphorylated tau (Courtesy of Rebecca Nisbet, Ph.D., University of Queensland, Brisbane, Austraila).

Western Blotting Analysis: A representative lot detected phospho-tau (pSer235) K3 tau transgenic mouse brain homogenates, but not in homogenates from tau knock-out (KO) (Courtesy of Rebecca Nisbet, Ph.D., University of Queensland, Brisbane, Austraila).
Research Category


Evaluated by Western Blotting in brain tissue lysates from either K3 transgenic mouse or MAPT KO mouse.

Western Blotting Analysis: 2 µg/mL of this antibody detected Microtubule-associated protein tau (pSer235) in brain tissue lysates from K3 transgenic mouse, but not in brain of microtubule-associated protein tau (MAPT) knock out mouse.

Target description

~55 kDa observed; 42.60 kDa calculated. Uncharacterized bands may be observed in some lysate(s).

Physical form

Format: Purified
Protein G purified
Purified mouse monoclonal antibody IgG1 in buffer containing 0.1 M Tris-Glycine (pH 7.4), 150 mM NaCl with 0.05% sodium azide.

Storage and Stability

Stable for 1 year at 2-8°C from date of receipt.

Other Notes

Concentration: Please refer to lot specific datasheet.


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.

Storage Class

12 - Non Combustible Liquids




Not applicable


Not applicable

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