Figure 1.

Comparison of the deduced amino acid sequences of the cat's claw, castor, and milkweed acyl-ACP desaturases. Identical and similar residues are shown on backgrounds of black and gray, respectively. The cleavage site for the plastid transit peptide of the castor enzyme is indicated by the arrowhead. Eight residues that lie near the bottom of the substrate-binding pocket in the crystal structure of the castor enzyme are indicated by asterisks. The GenBank accession numbers for the sequences are: cat's claw, AF051134; castor, M59857; and milkweed, U60277.