Figure 2. Acidocalcisomes in whole cells and subcellular fractions.
(a), (b), ultrathin sections of Agrobacterium tumefaciens (a) or Trypanosoma brucei procyclic forms (b) showing the acidocalcisomes as empty vesicles with electron-dense inclusions (arrows). (c), (d), visualization of acidocalcisomes in whole unfixed Herpetomonas anglusteri and Trypanosoma cruzi acidocalcisome fraction obtained by iodixanol centrifugation [6] allowed to adhere to Formvar- and carbon-coated grids and then observed by direct transmission electron microscopy (using an energy filter in (c)).Acidocalcisomes (black granules) appear disperse in the cytoplasm (c) or fraction (d). Scale bars: (a), 0.2 μm; (b), 2 μm; (c), 0.5 μm; (d), 1 μm. (a) was taken by Manfredo Seufferheld. (c) is reproduced with permission from ref. [114].