Figure 1

Conserved EPSPS2 sequences of Eleusine indica, Conyza canadensis, Arabidopsis thaliana, and Amaranthus palmeri. Each species is reported as having the Pro-106-Ser point mutation in cited publications, although position numbers from GenBank are different, as shown here. The highly conserved (homologous) region of amino acids with their respective positions are shown for each species. Elusine indica is included as the original “reference sequence” because Baerson et al.⁶ designated the mutation as p106, although this was based on a microbial sequence (see text). A glyphosate-resistant biotype of C. canadensis is included to illustrate the proline-to-serine mutation that confers glyphosate resistance.