3PY9:
reference: X-ray structural studies of the entire extra-cellular region of the Ser/Thr kinase PrkC from Staphylococcus aureus., Ruggiero A, Squeglia F, Marasco D, Marchetti R, Molinaro A, Berisio R, Biochem J. 2011 Jan 6. PMID: 21208192

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