Ready-to-use ELISA kits are available for the detection of ATPase, H+ transporting, lysosomal V1 subunit B2, an alias of the protein, ATPase H+ transporting V1 subunit B2. The official gene symbol is ATP6V1B2. The protein has a mass of 56.5 kDa and length of 511 residues. It is a member of the ATPase alpha/beta chains family and may be known by other names, including: testicular secretory protein Li 65, endomembrane proton pump 58 kDa subunit, V-ATPase B2 subunit, H+ transporting two-sector ATPase, and V-type proton ATPase subunit B brain isoform, and vacuolar proton pump subunit B 2.