- Localization of two genes encoding plasma membrane Ca2+ ATPases isoforms 2 (ATP2B2) and 3 (ATP2B3) to human chromosomes 3p26-->p25 and Xq28, respectively. Wang, M.G., Yi, H., Hilfiker, H., Carafoli, E., Strehler, E.E., McBride, O.W. Cytogenet. Cell Genet. (1994)