3F6R:
reference: Pseudosymmetry, high copy number and twinning complicate the structure determination of Desulfovibrio desulfuricans (ATCC 29577) flavodoxin., Guelker M, Stagg L, Wittung-Stafshede P, Shamoo Y, Acta Crystallogr D Biol Crystallogr. 2009 Jun;65(Pt 6):523-34. Epub 2009, May 15. PMID: 19465766

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