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The binding mode of erythrinin A at the binding site of BMP4. (A) Schematic diagram of the 3D mode. (B) Schematic diagram of the 2D mode. BMP4 forms a hydrogen bond with erythrinin A through its His‐240, His‐176, and Gln‐250. Meanwhile, His‐242 and erythrinin A formed a weak hydrogen bond with the Pi bond as a donor; His‐207 and erythrinin A formed C–H interaction, and Arg‐173 and erythrinin A formed alkyl interaction and PI.
