Fig 4.

Three dimensional structures of rice OsSdr4L (a) and tomato SlSdr4L (b) proteins. The corresponding structures were obtained using i-TASSER [22]. The α-helices and β-strands are shown in green and yellow, respectively. Critical amino acid sites responsible for both positive selection and functional divergence are labeled in red. The edges of amino (N) and carboxyl (COOH) terminals, and random view of predicted domains of I and II (PD319905 and PDB0A0W9) are indicated in light blue.