4BG8:
reference: Structural characterization of the ribonuclease H-like type ASKHA superfamily kinase MK0840 from Methanopyrus kandleri., Schacherl M, Waltersperger S, Baumann U, Acta Crystallogr D Biol Crystallogr. 2013 Dec;69(Pt 12):2440-50. doi:, 10.1107/S0907444913022683. Epub 2013 Nov 19. PMID: 24311585

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