Fig. 2

3D visualization of ligand-receptor interactions models. (a) CYC-KCG complex, (b) RAS1-KCG complex, (c) CYC-IGR complex, (d) RAS1-IGR complex. The molecular surfaces represent the hydrogen bond donor (prurple) and acceptor (green) properties of the ligand interacting with key amino acid residues within the quorum sensing receptors.