Stereoview of AbEPSP synthase domain organization. The peptide chain is colored sequentially: blue (N-terminus; Thr312–Leu394), cyan (Lys395–Gln468), green (Gln469–Leu537), yellow (Val538–Thr614), orange (Leu615–Gly692) and red (C-terminus; Asp693–Gln756). Individual subdomains are labeled with roman numerals. The N-terminal segment (blue) of the peptide chain participates in the formation of subdomains I, II and III, and a middle segment (yellow) participates in the formation of subdomains II and III. Subdomains IV, V and VI are comprised of contiguous sections of the peptide chain and are colored cyan, green and orange, respectively.