5XJ4:
reference: Distinct PD-L1 binding characteristics of therapeutic monoclonal antibody durvalumab., Tan S, Liu K, Chai Y, Zhang CW, Gao S, Gao GF, Qi J, Protein Cell. 2018 Jan;9(1):135-139. doi: 10.1007/s13238-017-0412-8. PMID: 28488247

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