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Surface Relaxation in Protein Crystals (2002)

Thomas, B. R. ; Robinson, I. K. ; Chernov, A. A. ; [et al.]

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Publication Date: 2019-07-18

Description: Surface X-ray diffraction measurements were performed on (111) growth faces of crystals of the Cellular iron-storage protein horse spleen ferritin. Crystal Trunkation Rods (CTR) were measured. A fit of the measured profile of the CTR revealed a surface roughness of 48 +/- 4.5 A and a top layer spacing contraction of 3.9 +/- 1.5%. In addition to the peak from the CTR, the rocking curves of the crystals displayed unexpected extra peaks. Multiple-scattering is demonstrated to account for them. Future applications of the method could allow the exploration of hydration effects on the growth of protein crystals.

Keywords: Nonmetallic Materials

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