Comparison of Arabidopsis SSADH1 with SSADH from bacteria and mammals. Alignment of the deduced amino acid sequences of the full-length SSADH from Arabidopsis (A), E. coli (E), and human (H) (Chambliss et al., 1998) (GenBank accession nos. AF117335, M8834, and Y11192, respectively), and a partial rat (R) SSADH (Chambliss et al., 1995) (GenBank accession no. P51650). Identical amino acids are boxed with a gray background. The ADH motifs discussed in the text are underlined. Arrows indicate the predicted cleavage sites of plant and human (Chambliss et al., 1998) SSADH by mitochondrial proteases.