Abstract Background With the exception of vertebrates. most organisms have plasma membrane associated ammonium transporters which primarily serve to import a source of nitrogen for nutritional purposes. Dictyostelium discoideum has three ammonium transporters. Amts A. https://www.diegojavierfares.com/flash-offer-A-D-EJ-123-Newton-Compact-Balance-Scale-120-x-0-001-g-hot-grab/