Ready-to-use ELISA kits are available for the detection of OK/SW-cl.56, an alias of the protein, tubulin beta class I. The official gene symbol is TUBB. The protein, with a mass of 49.7 kDa and length of 444 residues, is reported to be cytoplasmic. It is a member of the Tubulin family and may be known by other names, including: M40, CSCSC1, tubulin beta polypeptide, tubulin beta-5 chain, beta Ib tubulin, and tubulin beta chain, and TUBB5.