Figure 2.

Ribbon diagram of the BALC PSAT monomer. The α-helices are shown in light gray and the β-strands in dark gray. Secondary structure elements and N and C termini are labeled. The dashed line depicts the boundary between the small and the large domain. The side chain of the active site residue Lys196 and the PLP molecule are shown in ball-and-stick representation. The figure was produced using MOLSCRIPT (Kraulis 1991) and Raster3D (Merritt and Murphy 1994).