5USB:
reference: Discrimination against RNA Backbones by a ssDNA Binding Protein., Lloyd NR, Wuttke DS, Structure. 2018 May 1;26(5):722-733.e2. doi: 10.1016/j.str.2018.03.016. Epub 2018, Apr 19. PMID: 29681468

This OCA Structure page
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