Figure 1.

Multiple sequence aligment of bHLH motifs of the 57 PabHLH sequences. The scheme at top illustrates the locations and boundaries of the basic, helix 1, loop and helix 2 regions within the bHLH domain following that of Ferre-D’Amare et al. ( 1993). The numbers below the scheme (1 to 75) present the position within the bHLH motif as defined in this study. The shading of the alignment indicates identical residues in black, conserved residues in dark gray and similar residues in light gray. Highly conserved sites are indicated with asterisks on the top. Strigula denote gaps. The family names and high-order groups have been organized according to Table  1 of Ledent et al. ( 2002).