Frameshift potentials of Platanus PloAP3-1 (A), Pachysandra PtAP3-1 (B), Aristolochia AreAP3 (C), S. lycopersicon TM6 (D), Antirrhinum DefA (E) and a theoretical paleoAP3-encoding sequence (F). A-D, Nucleotide sequences of the paleoAP3-encoding regions of Platanus PloAP3-1 (A), Pachysandra PtAP3-2 (B), Aristolochia AreAP3 (C) and S. lycopersicon TM6 (D) with first and second predicted translation frames. E, Nucleotide sequence of the euAP3-encoding region of Antirrhinum DefA with first and third predicted translation frames. F, Nucleotide sequence of a theoretical DNA sequence that encodes a chemically conserved paleoAP3 motif in the first translational reading frame and a perfect euAP3 motif in the second translational reading frame. Chemical similarity with the paleoAP3 motif consensus YGxHDLRLA is indicated by purple letters while chemical similarity with the euAP3 motif consensus SDLTTFALLE is indicated by blue letters.