Fig. 10.

Binding model of GS1 to NH₄⁺ by molecular docking. The 3D AtGS1-NH₄⁺ interaction model (A). The 3D PnGS1-NH₄⁺ interaction model (B). The 3D StGS1-NH₄⁺ interaction model (C). The 3D ZmGS1-NH₄⁺ interaction model (D). The 2D AtGS1-NH₄⁺ interaction model (E). The 2D PnGS1-NH₄⁺ interaction model (F). The 2D StGS1-NH₄⁺ interaction model (G). The 2D ZmGS1-NH₄⁺ interaction model (H). Dashed lines indicate a potential interaction between amino acid residues with NH₄⁺. The black balls showed carbon atoms, the blue balls showed nitrogen atoms whereas the red balls showed the oxygen atoms. The residues involved in non-bonding interactions were shown as red bristles. The NH₄⁺ had hydrophobic interactions with Glu131 and His304