Mycobacterial rhomboids have different evolutionary history. A: Mycobacterial rhomboids clustered into two distinct clades (boxed blue and red). The Rv0110 mycobacterial orthologs (boxed blue) clustered with eukaryotic active rhomboids (unboxed). The Rv1337 mycobacterial orthologs (boxed red) appeared unique. Mycobacterial rhomboids could have been acquired at the same time, and the orthologs of Rv0110 were eventually lost in the MAC species and M. leprae. Mouse-protein farnesyl transferase, FT, [GenBank: AAI38303] was the outgroup. B: MAB0026 of M. abscessus (underlined blue) is conspicuously distant from its mycobacterial orthologs (boxed blue).