Conservation of GFAT catalytic domains in the apicomplexan glucosamine:fructose-6-phosphate aminotransferases. Schematic representations of the predicted protein sequences for EtGFAT (E. tenella, SNAP00000005021), PbGFAT (P. berghei, PB000392.03.0), TgGFAT (T. gondii, TGGT1_116350), and CpGFAT (C. parvum, cgd1_3730) show the location of the class II glutamine aminotransferase, “GAT2,” and two sugar isomerase motifs, “SIS (1)” and “SIS (2),” marked as boxes with the first and last residue numbered accordingly.