3VKX:
reference: Identification of a small molecule PCNA inhibitor that disrupts interactions with PIP-Box proteins and inhibits DNA replication., Punchihewa C, Inoue A, Hishiki A, Fujikawa Y, Connelly M, Evison B, Shao Y, Heath R, Kuraoka I, Rodrigues P, Hashimoto H, Kawanishi M, Sato M, Yagi T, Fujii N, J Biol Chem. 2012 Mar 1. PMID: 22383522

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