 | Acta Crystallographica Section D Acta Crystallographica Section D BIOLOGICAL CRYSTALLOGRAPHY |
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![[Figure 4]](ba5024fig4mag.jpg)
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Figure 4
For a centrosymmetric reflection, both Friedel mate amplitudes are equal, since all normal scattering contributions are purely real. If vectors FN and FA are parallel (bottom diagram), the measured amplitude, FT+ = ![[F_{T}^-}]](teximages/ba5024fi40.gif) , tends to be similar to the amplitude FT0 measured at the wavelength at which the anomalous effect is negligible. If FN and FA vectors are antiparallel (top diagram), the measured total anomalous amplitude tends to be larger than that without the anomalous effect. |
![[Figure 4]](ba5024fig4.jpg)
| BIOLOGICAL CRYSTALLOGRAPHY |
ISSN: 1399-0047
