3HFH:
reference: Crystal Structure of the Three-Tandem FF Domains of the Transcription Elongation Regulator CA150., Lu M, Yang J, Ren Z, Sabui S, Espejo A, Bedford MT, Jacobson RH, Jeruzalmi D, McMurray JS, Chen X, J Mol Biol. 2009 Aug 4. PMID: 19660470

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