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57 citations found for Kasai,

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A multiwavelength X-ray diffraction study was performed at 6 Å resolution on the native cytochrome c' crystal from Rhodospirillum rubrum, which contains heme irons. The X-ray intensity data from the crystal were collected on a four-circle diffractometer with three wavelengths, [lambda]1 = 1.077, [lambda]2 = 1.730 and [lambda]3 = 1.757 Å, using the synchrotron radiation produced by the storage ring in the Photon Factory, National Laboratory for High Energy Physics. [lambda]2 and [lambda]3 are above and below the energy of the K absorption edge of iron ([lambda]e = 1.743 Å) respectively, while [lambda]1 is far from the edge. The positions of the two iron atoms in the crystal could be determined from the difference Patterson maps based on either the real or imaginary components of the anomalous scattering effect caused by iron. The best phase angles for the crystal were calculated from the X-ray intensity data measured with [lambda]1 and [lambda]2 by the method which is basically the same as the isomorphous replacement method. Although the resulting best phase angles differed 75° on the average from those obtained by the multiple isomorphous replacement method, the molecular boundary and [alpha] helices could be recognized on the electron density map.

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The title compound, [1aS]-6-amino-1,1a,2,4,7,8,8a,8b-octahydro-8a-hydroxy- 1,5-dimethyl-4,7-dioxoazirino[2',3':3,4]pyrrolo[1,2-a]indol-7-ylmethyl, is a mitomycin derivative, mitomycins being antitumor antibiotics. The O atoms of the quinone ring deviate significantly from the least-squares plane of the quinone ring.

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Acta Cryst. (1987). A43, C52
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The title compound, [1aS-(1a[alpha],8a[alpha],8b[alpha])]-6-amino-1,1a,2,8,8a,8b-hexahydro-8a-methoxy- 1,5-dimethyl-8-methyleneazirino[2',3':3,4]pyrrolo[1,2-a]indole-4,7-dione, C15H17N3O3, is a derivative of the mitomycins, which are antitumor antibiotics. The quinone O atoms deviate significantly from the least-squares plane of the quinone ring.

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The crystal structure of pseudoazurin from Methylobacterium extorquens AM1 has been solved by the molecular replacement method and refined at 1.5 Å resolution.

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Acta Cryst. (2008). A64, C338-C339
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Acta Cryst. (2017). A73, C1385
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Acta Cryst. (1984). A40, C295-C296
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