6CKH:
reference: The three-dimensional structure and recognition mechanism of Manduca sexta peptidoglycan recognition protein-1., Hu Y, Cao X, Li X, Wang Y, Boons GJ, Deng J, Jiang H, Insect Biochem Mol Biol. 2019 May;108:44-52. doi: 10.1016/j.ibmb.2019.03.001., Epub 2019 Mar 21. PMID: 30905759

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