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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
The binding modes of the (a) S and (b) R systems. The key residues on APD-L1 and BPD-L1 are shown as cyan and green sticks, respectively, while the ligands are shown as beige sticks. The hydrophobic interactions and H bonds are shown as grey and green dashes, respectively.