ATP6V0A1 and neuroblastoma: To examine the effects of ATP6V0A1 variants on the cellular localization and lysosomal acidification, we established stable human embryonic kidney cell lines (HEK293FT) expressing C-terminal 3×HA-tagged human ATP6V0A1 (ATP6V0A1-3×HA) and stable neuroblastoma-2A (N2A) cell lines expressing N-terminal HA-tagged human ATP6V0A1 (HA-ATP6V0A1).