The Estimation of Four-Phase Structure Invariants Using the Single Difference of Isomorphous Structure Factors

Kyriakidis, C. E.; Peschar, R.; Schenk, H.

doi:10.1107/s0108767395011226

Cited by 8 publications

(1 citation statement)

References 10 publications

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“…They can contribute, together with the results recently obtained for the quartet invariants (Giacovazzo & Siliqi, 1996a,b;Kyriakidis, Peschar & Schenk, 1996), to enlighten three highly relevant problems: (a) the evaluation of the information really provided by the cross terms for estimation of the structure invariants when isomorphous data are available; (b) the nature and the amount of the information provided by the prior knowledge of the heavy-atom structure; (c) the relation between the entire armory of direct methods and the traditional single isomorphous replacement (SIR) approach, when the heavy-atom structure is or is not available. All such themes will be discussed in a future paper.…”

Section: Discussionmentioning

confidence: 99%

On Integrating Direct Methods and Isomorphous Replacement Techniques. The Formula P₁₀

Giacovazzo¹,

Siliqi²,

Cascarano³

et al. 1997

Acta Cryst Sect A

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The joint probability distribution of ten pairs of isomorphous structure factors has been derived. Their indices correspond to the reflexions contained in the second phasing shell of the triplet invariant, as described by the theory of representations [Giacovazzo (1977). Acta Cryst. A33, 934-944; Giacovazzo (1980). Acta Cryst. A36, 362-373]. The conclusive formula allows the estimation of triplet invariants via a second representation formula, called the P10 formula, which is more accurate than the traditional formula of Giacovazzo, Cascarano & Zheng [Acta Cryst. (1988), A44, 45-51]. The procedure is also able to take into consideration the prior information on the heavy-atom structure, when available.

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Section: Discussionmentioning

confidence: 99%

On Integrating Direct Methods and Isomorphous Replacement Techniques. The Formula P₁₀

Giacovazzo¹,

Siliqi²,

Cascarano³

et al. 1997

Acta Cryst Sect A

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Direct Methods in Relation to Isomorphous Data

Peschar

1998

Direct Methods for Solving Macromolecular Structures

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Integration of Direct Methods with SIR Techniques

Giacovazzo¹,

Siliqi

1998

Direct Methods for Solving Macromolecular Structures

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The Estimation of Four-Phase Structure Invariants Using the Single Difference of Isomorphous Structure Factors

Cited by 8 publications

References 10 publications

On Integrating Direct Methods and Isomorphous Replacement Techniques. The Formula P₁₀

On Integrating Direct Methods and Isomorphous Replacement Techniques. The Formula P₁₀

Direct Methods in Relation to Isomorphous Data

Integration of Direct Methods with SIR Techniques

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The Estimation of Four-Phase Structure Invariants Using the Single Difference of Isomorphous Structure Factors

Cited by 8 publications

References 10 publications

On Integrating Direct Methods and Isomorphous Replacement Techniques. The Formula P10

On Integrating Direct Methods and Isomorphous Replacement Techniques. The Formula P10

Direct Methods in Relation to Isomorphous Data

Integration of Direct Methods with SIR Techniques

Contact Info

Product

Resources

About

On Integrating Direct Methods and Isomorphous Replacement Techniques. The Formula P₁₀

On Integrating Direct Methods and Isomorphous Replacement Techniques. The Formula P₁₀