Bikont

A bikont ("two flagellae") is any eukaryotic organism in the group Bikonta. Many single-celled members of the group, and the presumed ancestor, have two flagella.^[1]

Bikonts
A radiolarian
Scientific classification
Domain:	Eukaryota
(unranked):	Bikonta Cavalier-Smith, 1993
Subgroups
Apusozoa Rhizaria Excavata Archaeplastida Chromalveolata
Synonyms
Biciliata Cavalier-Smith, 1993 Diaphoretickes Adl et al., 2012 Diphoda Derelle et al., 2015

The TSAR supergroup is a group of Bikonts containing telonemia (T), stramenopiles (S), alveolata (A), and rhizaria (R).

The SAR supergroup is a group of Bikonts containing stramenopiles (S), alveolata (A), and rhizaria (R).

Enzymes

Another shared trait of bikonts is the fusion of two genes into a single unit. The genes for thymidylate synthase (TS) and dihydrofolate reductase (DHFR) code for a single protein with two functions.^[2]

The genes are separately translated in unikonts.