AnaSpec is excited to announce the release of 4 more new phosphospecific anti-Tau
antibodies. This represents the industry’s largest collection of anti-Tau
antibodies - 17 phosphospecific and 9 non-phosphospecific antibodies.
AnaSpec’s expertise in phosphopeptide synthesis combined with excellent
affinity purification has resulted in the production of an anti-Tau to phosphoserine
at position 235 (cat# 55315) clearly delineated from one at phosphoserine position
238 (cat# 55323). Our phosphospecific antibodies do not cross-react
with each other (see Figure 1).
Figure 1. Dot blot of Tau antibodies.
Tau is a collection of microtubule-associated proteins that is involved
in microtubule assembly and stabilization (1). In adult human brain, 6 isoforms,
ranging between 352 and 441 amino acids in length, are produced as a result of
alternative RNA splicing (2, 3). The expression of Tau isoforms is developmentally
regulated, as only the smallest Tau polypeptide is expressed in the fetal brain.
Hyperphosphorylated Tau is the major component of the paired helical filament
of Alzheimer’s disease. Anti-phospho-Tau antibodies are used to identify
specific amino acids that are phosphorylated in Tau from normal brains and Alzheimer’s
disease brains. The Tau proteins, especially in developing brains and in Alzheimer
brains, are phosphorylated in vivo at many different sites such as Thr181, Ser198,
Ser199, Ser202, Thr205, Thr212, Ser214, Thr217, Thr231, Ser235, Ser262, Ser356,
Ser396, Ser400, Ser404 and Ser413 (4, 5).
Rabbit anti-Phospho-Tau antibodies were raised against synthetic phosphopeptides.
These antibodies were evaluated for specificity with ELISA and/or Western blot.
By Western blot, an immunoreactive band around 52 kDa was observed in the mouse
whole brain lysate. Species reactivity includes human, mouse and rat. Some antibodies
have also shown reactivity with bovine, chicken and zebrafish.
Complementing one of the world’s most comprehensive collections of b-amyloid
peptides, the availability of these anti-Tau antibodies demonstrates AnaSpec’s
commitment to delivering integrated solutions for Alzheimer research.
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for more information.
NEW Tau Antibodies
Previously Released Tau Antibodies
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REFERENCES:
1. Cleveland, DW. et al. J. Mol. Biol. 116, 207 (1977).
2. Goedert, M. et al. Neuron 3, 519 (1989).
3. Geodert, M. et al. EMBO J. 8, 393 (1989).
4. Billingsley, M. et al. Biochem J. 323, 577 (1997) .
5. Hanger, DP. et al. J. Neurochem. 71, 2465. (1998).
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