1RL3: Crystal Structure Of Camp-Free R1a Subunit Of Pka
reference: RIalpha subunit of PKA: a cAMP-free structure reveals a hydrophobic capping mechanism for docking cAMP into site B., Wu J, Brown S, Xuong NH, Taylor SS, Structure. 2004 Jun;12(6):1057-65. PMID: 15274925

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