5′ ends of insect PEPCK amino acid sequences. Abbreviations: dme, Drosophila melanogaster; bmo, Bombyx mori; ceu, Colias eurytheme; cyto, cytosol form; mito, mitochondrial form. Arrow marks the splice break between the alternative 5′ exons 1 and the common block exons 2–13 in Bombyx and Colias. The numbering of this figure does not match the standard numbering (based on the mito form) of Colias base pair and amino acid positions used in the rest of the paper: e.g., the splice break occurs between amino acids 11 and 12 in the standard numbering.
Watt et al. BMC Evolutionary Biology 2013 13:9 doi:10.1186/1471-2148-13-9