Several types of ATP phosphohydrolase are listed here. Entries EC 3.6.3.1 to EC 3.6.3.12 and EC 3.6.3.53 are enzymes undergoing covalent phosphorylation of an aspartate residue during the transport cycle; entries EC 3.6.3.14 and EC 3.6.3.15 refer to enzymes of complicated membrane and non-membrane location that can also serve in ATP synthesis; entry EC 3.6.3.16 is a multisubunit enzyme that is involved in arsenite transport only; entries EC 3.6.3.17 to EC 3.6.3.50 are two-domain enzymes of the ABC family; entries EC 3.6.3.51 and EC 3.6.3.52 are parts of a complex protein-transporting machinery in mitochondria and chloroplasts.