1NPS:
reference: The domains of protein S from Myxococcus xanthus: structure, stability and interactions., Wenk M, Baumgartner R, Holak TA, Huber R, Jaenicke R, Mayr EM, J Mol Biol 1999 Mar 12;286(5):1533-45. PMID: 10064714

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