Figure S2. Amino acid alignment of CS-LIKE (CSL) and the major OASTL isoforms in A. thaliana: cytosolic OAS-A1, plastid OAS-B and mitochondrial OAS-C. The alignment was created with Vector NTI software. The PLP-binding sites are shown in red, the substrate binding site is in blue and the SAT protein-interaction site is in black.