4Z5V:
reference: Crystal structure of the mouse hepatitis virus ns2 phosphodiesterase domain that antagonizes RNase L activation., Sui B, Huang J, Jha BK, Yin P, Zhou M, Fu ZF, Silverman RH, Weiss SR, Peng G, Zhao L, J Gen Virol. 2016 Jan 12. doi: 10.1099/jgv.0.000395. PMID: 26757803

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