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Results for DC.creator="G." AND DC.creator="Stubbs" in section 19.5.7 of volume F |
Determination of structures
International Tables for Crystallography (2012). Vol. F, Section 19.5.7, pp. 586-588 [ doi:10.1107/97809553602060000871 ]
... of disorientation and cylindrical averaging. Patterson methods (MacGillavry & Bruins, 1948; Stubbs, 1987) have sometimes been useful, but the cylindrically averaged Patterson ... observed helical parameters. Extensions of the isomorphous-replacement method (Namba & Stubbs, 1985) have been useful in determining structures, such as those ... of protein crystallography, has been useful in studying helical viruses (Stubbs & Diamond, 1975; Namba & Stubbs, 1985). The dimensions are ...
Difference Fourier methods
International Tables for Crystallography (2012). Vol. F, Section 19.5.7.6, p. 588 [ doi:10.1107/97809553602060000871 ]
... is more serious and must be taken into account. Namba & Stubbs (1987b) have shown that the coefficients yielding the most accurate ... arrangements. J. Biomol. Struct. Dynam. 15, 285-305. Namba, K. & Stubbs, G. (1987b). Difference Fourier syntheses in fiber diffraction. Acta ...
Refinement: large unit cells
International Tables for Crystallography (2012). Vol. F, Section 19.5.7.5, pp. 587-588 [ doi:10.1107/97809553602060000871 ]
... determination of noncrystalline fibres. Since helical aggregates have finite radii, g terms [equation (19.5.3.6)] can be set to zero outside a ... transformed to obtain refined estimates of the phases of the G terms. More detailed solvent-flattening algorithms can also be used (Namba & Stubbs, 1985). Molecular models can be refined by methods ...
Initial models: large unit cells
International Tables for Crystallography (2012). Vol. F, Section 19.5.7.4, p. 587 [ doi:10.1107/97809553602060000871 ]
... of protein crystallography, has been useful in studying helical viruses (Stubbs & Diamond, 1975; Namba & Stubbs, 1985). The dimensions are the real and imaginary parts ... as many heavy-atom derivatives as the number of significant G terms in equation (19.5.3.7) are required. If the structure ...
Data-to-parameter ratio
International Tables for Crystallography (2012). Vol. F, Section 19.5.7.3, p. 587 [ doi:10.1107/97809553602060000871 ]
Data-to-parameter ratio 19.5.7.3. Data-to-parameter ratio The total number of data used in this refinement process is M + I + J, where M, I and J are, respectively, the number of observations in the first three terms of equation (19.5.7.1). If P is the number of parameters refined ...
Refinement: small unit cells
International Tables for Crystallography (2012). Vol. F, Section 19.5.7.2, p. 587 [ doi:10.1107/97809553602060000871 ]
Refinement: small unit cells 19.5.7.2. Refinement: small unit cells The widely used linked-atom least-squares (LALS) technique (Arnott & Wonacott, 1966; Smith & Arnott, 1978) and the variable virtual bond (PS79) method (Zugenmaier & Sarko, 1980) were developed for fibre structures. They are similar in principle to the least-squares refinement procedure for ...
Initial models: small unit cells
International Tables for Crystallography (2012). Vol. F, Section 19.5.7.1, pp. 586-587 [ doi:10.1107/97809553602060000871 ]
Initial models: small unit cells 19.5.7.1. Initial models: small unit cells For many biopolymers, especially polypeptides, polynucleotides and polysaccharides, the repeating unit is a monomer or a small oligomer and the unit-cell dimensions are in the range 10 to 50Å. Such unit cells can accommodate one or more polymer ...
Evaluation
International Tables for Crystallography (2012). Vol. F, Section 19.5.7.7, p. 588 [ doi:10.1107/97809553602060000871 ]
... large numbers of intensities have been superposed by cylindrical averaging (Stubbs, 1989). The largest likely R value for noncrystalline TMV ... structures with large unit cells (Namba et al., 1989; Wang & Stubbs, 1994), both to identify errors in early models and to ... factors. Acta Cryst. A45, 573-576. Namba, K., Pattanayak, R. & Stubbs, G. (1989). Visualization of protein-nucleic acid interactions ...
International Tables for Crystallography (2012). Vol. F, Section 19.5.7, pp. 586-588 [ doi:10.1107/97809553602060000871 ]
... of disorientation and cylindrical averaging. Patterson methods (MacGillavry & Bruins, 1948; Stubbs, 1987) have sometimes been useful, but the cylindrically averaged Patterson ... observed helical parameters. Extensions of the isomorphous-replacement method (Namba & Stubbs, 1985) have been useful in determining structures, such as those ... of protein crystallography, has been useful in studying helical viruses (Stubbs & Diamond, 1975; Namba & Stubbs, 1985). The dimensions are ...
Difference Fourier methods
International Tables for Crystallography (2012). Vol. F, Section 19.5.7.6, p. 588 [ doi:10.1107/97809553602060000871 ]
... is more serious and must be taken into account. Namba & Stubbs (1987b) have shown that the coefficients yielding the most accurate ... arrangements. J. Biomol. Struct. Dynam. 15, 285-305. Namba, K. & Stubbs, G. (1987b). Difference Fourier syntheses in fiber diffraction. Acta ...
Refinement: large unit cells
International Tables for Crystallography (2012). Vol. F, Section 19.5.7.5, pp. 587-588 [ doi:10.1107/97809553602060000871 ]
... determination of noncrystalline fibres. Since helical aggregates have finite radii, g terms [equation (19.5.3.6)] can be set to zero outside a ... transformed to obtain refined estimates of the phases of the G terms. More detailed solvent-flattening algorithms can also be used (Namba & Stubbs, 1985). Molecular models can be refined by methods ...
Initial models: large unit cells
International Tables for Crystallography (2012). Vol. F, Section 19.5.7.4, p. 587 [ doi:10.1107/97809553602060000871 ]
... of protein crystallography, has been useful in studying helical viruses (Stubbs & Diamond, 1975; Namba & Stubbs, 1985). The dimensions are the real and imaginary parts ... as many heavy-atom derivatives as the number of significant G terms in equation (19.5.3.7) are required. If the structure ...
Data-to-parameter ratio
International Tables for Crystallography (2012). Vol. F, Section 19.5.7.3, p. 587 [ doi:10.1107/97809553602060000871 ]
Data-to-parameter ratio 19.5.7.3. Data-to-parameter ratio The total number of data used in this refinement process is M + I + J, where M, I and J are, respectively, the number of observations in the first three terms of equation (19.5.7.1). If P is the number of parameters refined ...
Refinement: small unit cells
International Tables for Crystallography (2012). Vol. F, Section 19.5.7.2, p. 587 [ doi:10.1107/97809553602060000871 ]
Refinement: small unit cells 19.5.7.2. Refinement: small unit cells The widely used linked-atom least-squares (LALS) technique (Arnott & Wonacott, 1966; Smith & Arnott, 1978) and the variable virtual bond (PS79) method (Zugenmaier & Sarko, 1980) were developed for fibre structures. They are similar in principle to the least-squares refinement procedure for ...
Initial models: small unit cells
International Tables for Crystallography (2012). Vol. F, Section 19.5.7.1, pp. 586-587 [ doi:10.1107/97809553602060000871 ]
Initial models: small unit cells 19.5.7.1. Initial models: small unit cells For many biopolymers, especially polypeptides, polynucleotides and polysaccharides, the repeating unit is a monomer or a small oligomer and the unit-cell dimensions are in the range 10 to 50Å. Such unit cells can accommodate one or more polymer ...
Evaluation
International Tables for Crystallography (2012). Vol. F, Section 19.5.7.7, p. 588 [ doi:10.1107/97809553602060000871 ]
... large numbers of intensities have been superposed by cylindrical averaging (Stubbs, 1989). The largest likely R value for noncrystalline TMV ... structures with large unit cells (Namba et al., 1989; Wang & Stubbs, 1994), both to identify errors in early models and to ... factors. Acta Cryst. A45, 573-576. Namba, K., Pattanayak, R. & Stubbs, G. (1989). Visualization of protein-nucleic acid interactions ...
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