Structural variability of A-DNA in crystals of the octamer d(pCpCpCpGpCpGpGpG)

Abstract excerpt

We have determined the structure of the synthetic DNA octamer d(pCpCpCpGpCpGpGpG) in five different crystal forms by single crystal X-ray diffraction. One crystal belongs to the space group P4(3)2(1)2 with a = b = 41.77, c = 25.15 A, whereas all others have the space group P2(1)2(1)2(1) with progressively decreasing unit cell volumes. In all crystals the octamer forms duplexes of A-DNA and all crystals display a...

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