3ECL:
reference: Visualizing breathing motion of internal cavities in concert with ligand migration in myoglobin., Tomita A, Sato T, Ichiyanagi K, Nozawa S, Ichikawa H, Chollet M, Kawai F, Park SY, Tsuduki T, Yamato T, Koshihara SY, Adachi SI, Proc Natl Acad Sci U S A. 2009 Feb 9. PMID: 19204297

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