4GR4:
reference: Structural Basis of the Interaction of MbtH-Like Proteins, Putative Regulators of Non-Ribosomal Peptide Biosynthesis, with Adenylating Enzymes., Herbst DA, Boll B, Zocher G, Stehle T, Heide L, J Biol Chem. 2012 Nov 28. PMID: 23192349

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