title: A crystal structure study when crystallized only in d(CG)3 + methylamine and a d(CG)3 + metal ion.
abstract: There is not an example of the crystallization only of d(CG)(3) and a metallic cation without putting the amine in addition in there is no example of the crystallization d(CG)(3) with methylamine that is the mono-amine so far either. We were able to obtain a very beautiful crystal with all sides of 0.3mm by the sitting drop method that had done the crystallization of d(CG)(3)+ methylamine and d(CG)(3)+ Mg(2 +). The crystal was diffracted up to 1.0 A by using the synchrotron radiation. As a result of the X-ray crystal structure analysis, methylamine was not seen while d(CG)(3)+ methylamine was crystallizing mysteriously. d(CG)(3) had stabilized with five Mg(2+) ions. d(CG)(3) had stabilized similarly with five Mg(2+) ions in the crystal of d(CG)(3)+ Mg(2+). The position of these five Mg(2+) ions understood that I agreed on superimpose in a crystal of d(CG)(3) + methylamine, a crystal of d(CG)(3)+Mg(2+), a crystal of d(CG)(3) + spermidine, and crystals of d(CG)(3) + PA (24) which was already analyzed so as to cut it and stabilized d(CG)(3) at an about the same position.
authors.affiliation: Osaka University of Pharmaceutical Sciences 4-20-1 Nasahara, Takatsuki, Osaka 569-1094 Japan.
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Ohishi
authors.forename: Toshimasa
authors.initials: T
authors.lastname: Ishida
authors.forename: Koji
authors.initials: K
authors.lastname: Tsukamoto
authors.forename: Naoyoshi
authors.initials: N
authors.lastname: Maezaki
authors.forename: Tetsuaki
authors.initials: T
authors.lastname: Tanaka
mesh_terms: D002412:Cations / Q000737:chemistry; D003460:Crystallization; D018360:Crystallography, X-Ray; D043542:DNA, Z-Form / Q000737:chemistry; D008274:Magnesium / Q000737:chemistry*; D008744:Methylamines / Q000737:chemistry*; D008958:Models, Molecular; D009838:Oligodeoxyribonucleotides / Q000737:chemistry*
chemical_list: D002412:Cations; D043542:DNA, Z-Form; D008744:Methylamines; D009838:Oligodeoxyribonucleotides; C041751:tri(deoxycytidylic acid-deoxyguanylic acid); C027451:methylamine; D008274:Magnesium