Ready-to-use ELISA kits are available for the detection of pTau, an alias of the protein, microtubule associated protein tau. The official gene symbol is MAPT. The protein, with a mass of 78.9 kDa and length of 758 residues, is reported to be cytoplasmic and membrane-associated. It may be known by other names, including: FTDP-17, DDPAC, paired helical filament-tau, neurofibrillary tangle protein, PHF-tau, G protein beta1/gamma2 subunit-interacting factor 1, and MSTD.