α-tubulin, also called as tubulin α 4a (TUBA4A), is mapped to human chromosome 2q35. The gene codes for a member of the α-tubulin family containing 448 amino acids. TUBA4A belongs to the subfamily of tubulin, which is the major building block of microtubules. α-subunit of tubulin has molecular weight of 50,000.

The antibody recognizes an epitope located on the α3 isoform of Chlamydomonas axonemal α-tubulin, within four residues of Lys-40 when this amino acid is acetylated. A sequence very similar to the one detected by the antibody in Chlamydomonas is found in the majority of α-tubulins, but the corresponding region is markedly divergent in some α-tubulin isoforms from chicken, Drosophila and yeast. The antibody has been used to detect acetylated α-tubulins in several organisms. Occasionally, the epitope recognized by the antibody may be absent or masked as it is in the kangaroo rat epithelial-like cell line PtK₂.

acetylated α-tubulin from the outer arm of sea urchin sperm axonemes.

Monoclonal Anti-Tubulin, Acetylated antibody produced in mouse has been used in following studies:

• immunofluorescence.
• western blotting.
• immunocytochemistry.
• immunohistochemistry.

Acetylated tubulin is associated with axoneme assembly in a variety of organisms. Acetylated tubulin might play a crucial role in the differentiation of microtubule structure and function. Post translational modification of α-tubulin i.e. the reversible addition of an acetyl group to Lys40, by specific acetylase, results in acetylated tubulin.

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