3K1J:
reference: Crystal structure of Lon protease: molecular architecture of gated entry to a sequestered degradation chamber., Cha SS, An YJ, Lee CR, Lee HS, Kim YG, Kim SJ, Kwon KK, De Donatis GM, Lee JH, Maurizi MR, Kang SG, EMBO J. 2010 Oct 20;29(20):3520-30. Epub 2010 Sep 10. PMID: 20834233

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