Anti-v-type proton ATPase subunit e 1 antibodies are protein reagents that detect specific antigens. The v-type proton ATPase subunit e 1 antigen is another term for the human protein ATPase H+ transporting V1 subunit E1, encoded by the ATP6V1E1 gene. The protein is a known subunit of the V1 complex of vacuolar(H+)-ATPase (V-ATPase), a multisubunit enzyme composed of a peripheral complex (V1) that hydrolyzes ATP and a membrane integral complex (V0) that translocates protons. Canonically, it has an amino acid length of 226 residues and a mass of 26.1 kilodaltons. Its subcellular localization is in the cytoplasmic vesicles and cell membrane and it is widely expressed in many tissue types. The v-type proton ATPase subunit e 1 protein is a member of the V-ATPase E subunit protein family. Other alias names for v-type proton ATPase subunit e 1 include ARCL2C, ATP6E, and ATP6E2.