title: Crystallization and preliminary X-ray diffraction analysis of a self-complementary DNA heptacosamer with a 20-base-pair duplex flanked by seven-nucleotide overhangs at the 3'-terminus.
abstract: The self-complementary DNA heptacosamer (a 27-mer oligonucleotide) with sequence d(CGAGCACTGCGCAGTGCTCGTTGTTAT) forms a 20-base-pair duplex flanked by seven-nucleotide overhangs at the 3'-terminus. Crystals of the oligonucleotide were obtained by sitting-drop vapour diffusion and diffracted to 2.8 A resolution. The oligonucleotide was crystallized at 277 K using polyethylene glycol as a precipitant in the presence of magnesium chloride. The crystals belonged to the triclinic space group, with unit-cell parameters a = 48.74, b = 64.23, c = 79.34 A, alpha = 91.37, beta = 93.21, gamma = 92.35 degrees .
authors.affiliation: Department of Life Science, Dongguk University-Seoul, 26 Pil-dong 3-ga, Jung-gu, Seoul 100-715, Republic of Korea.
authors.forename: Hyun Koo
authors.initials: HK
authors.lastname: Yeo
authors.forename: Jae Young
authors.initials: JY
authors.lastname: Lee
mesh_terms: D020029:Base Pairing; D001483:Base Sequence; D003460:Crystallization; D018360:Crystallography, X-Ray; D018076:DNA, Complementary / Q000737:chemistry*
chemical_list: D018076:DNA, Complementary
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