Figure 3.

Sequence Comparison of the Alb3 Protein with YidC and Oxa1p.

The protein sequences were aligned using ClustalW (Thompson et al., 1994) and Boxshade (http://www.ch.embnet.org/software/BOX_form.html). Alb3.1 and Alb3.2 are from Chlamydomonas; atAlb3 (Sundberg et al., 1997) and atAlb3.2 are from Arabidopsis; YidC is from E. coli (Luirink et al., 2001); Oxa1p is from S. cerevisiae (Bonnefoy et al., 1994). The sites corresponding to the introns are indicated by open and closed wedges for Alb3.1 of Chlamydomonas and atAlb3 of Arabidopsis, respectively. In the phylogenetic tree at bottom, the numbers of amino acid substitutions per alignment site are indicated on the branches. The phylogenetic analysis was performed using the PHYLO_WIN program (Galtier and Gouy, 1996).