4MMK:
reference: Effect of conserved intersubunit amino Acid substitutions on hfq protein structure and stability., Murina VN, Melnik BS, Filimonov VV, Uhlein M, Weiss MS, Muller U, Nikulin AD, Biochemistry (Mosc). 2014 May;79(5):469-77. doi: 10.1134/S0006297914050113. PMID: 24954598

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