Mitochondria-derived organelles in the diplomonad fish parasite Spironucleus vortens

- Spironucleus vortens has 200-1000 and 100-150 nm double-membraned organelles.
- The larger organelles take up membrane potential-sensitive lipophilic probes.
- Anti- Fe-hydrogenase localizes to the large, autofluorescent organelles.
- Anti-frataxin and Isu1 localize to the smaller organelles.
- Putative presence of mitochondria-derived organelles in S. vortens.