2W7Z:
reference: Crystallization of a pentapeptide-repeat protein by reductive cyclic pentylation of free amines with glutaraldehyde., Vetting MW, Hegde SS, Blanchard JS, Acta Crystallogr D Biol Crystallogr. 2009 May;65(Pt 5):462-9. Epub 2009, Apr 18. PMID: 19390151

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