| Autor: |
H. Schenk, R. Peschar, C. E. Kyriakidis |
| Rok vydání: |
1993 |
| Předmět: |
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| Zdroj: |
Acta Crystallographica Section A Foundations of Crystallography. 49:359-369 |
| ISSN: |
0108-7673 |
| DOI: |
10.1107/s0108767392009851 |
| Popis: |
The role of the doublet phase sum present among isomorphous data sets is investigated in connection with the triplet-phase-sum statistics. Several probabilistic and algebraic techniques are discussed to estimate the doublets. The combination of an algebraic estimation technique and a new difference Patterson synthesis, the maxima of which are used to improve iteratively the doublet phase sums, is shown to be successful. Test results for large model structures and idealized protein data show that this technique reduces the triplet-phase-sum errors to a level small enough for ab initio direct-methods applications. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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