Figure 1.
Computer-aided homology analysis by PHYLIP (Felsenstein, 1993) of aligned SUTs from tobacco (NtSut1), potato (StSut1) (Riesmeier et al., 1993), spinach (SoSut1) (Riesmeier et al., 1992), Arabidopsis (AtSuc1 and AtSuc2) (Sauer and Stolz, 1994), Plantago major (PmSuc1 and PmSuc2) (Gahrtz et al., 1994, 1996), castor bean (RcSut1) (Weig and Komor, 1996), rice (OsSut1) (Hirose et al., 1997), and fava bean (VfSut1) (Weber et al., 1997). The comparison was restricted to the region in NtSUT1 from amino acid position 19 to 472. The numbers indicate the occurrence of a branch in 100 bootstrap replicates of a given data set. OsSut1 was used as the outgroup.