An organization unikonte is a unicellular organization Eucaryote having single whips, at least ancestralement. The current scientific research suggests that some unikontes were the ancestors of the opisthokontes and the Amoebozoa, and that some bikontes (unicellular eucaryotes having two whip) were the ancestors of the Archaeplastida, Excavata, Rhizaria and Chromalveolata.

The organizations unikontes also have gene triple fusion not existing at the bikontes, as well as single a Centriole (Rider-Smith, 2002,2006) (some unikontes has 2 centrioles but their origin is évolutivement different from those of the bikontes, indicating an evolutionary convergence here (Rider-Smith 2006). The three genes having amalgamated at the unikontes but not at the procaryotes, nor at the bikontes code enzymes intervening in the nucleotide synthesis Pyrimidine S: carbamyl phosphates synthase, dihydroorotase, aspartate carbamoyltransferase (Rider-Smith 2006). It seems probable that this triple fusion is the result of 2 double successive fusions, a rare event in the evolution and who has few chances to be reversible. This situation is in favor of the theory proposing an ancestor common to the Opisthokonta and the Amoebozoa.

See too

Internal bonds

• Bikonta
• Opisthokonta