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Molecular docking with NF-κB complex. Docking of (+)-betulin with PDB structures: (A) NF-κB p50 (1NFK); (B) NF-κB p52 (IA3Q); (C) NF-κB p65 (1MY5); and (D) docking of betulinic acid with NF-κB p65 (1MY5). Green dotted lines show distance and potential hydrogen bonding between NF-κB (gray) complex and (+)-betulin (cygan) ang.
