Figure 2.

C terminus alignment of wheat (TaRca) and Arabidopsis (AtRca) α and β Rca isoforms indicating where residue substitutions were made in this study. The amino acid positions 428 for the wheat TaRca2-α isoform and 432 for the wheat TaRca1-β isoform were substituted from a native Lys to either an Arg or Gln. The Cys at position 441 of TaRca2-α isoform was substituted to a Ser to emulate the reduction of the Cys-441–Cys-461 disulfide bond state of the α isoform. The dashed lines indicate where the disulfide bond is formed.