4KP2:
reference: Structural characterization and comparison of the large subunits of IPM isomerase and homoaconitase from Methanococcus jannaschii., Lee EH, Lee K, Hwang KY, Acta Crystallogr D Biol Crystallogr. 2014 Apr 1;70(Pt 4):922-31. doi:, 10.1107/S1399004713033762. Epub 2014 Mar 19. PMID: 24699638

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