Recommanded Product: 5-((3aS,4S,6aR)-2-Oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanoic acidIn 2019 ,《Making routine native SAD a reality: lessons from beamline X06DA at the Swiss Light Source》 was published in Acta Crystallographica, Section D: Structural Biology. The article was written by Basu, Shibom; Finke, Aaron; Vera, Laura; Wang, Meitian; Olieric, Vincent. The article contains the following contents:
Native single-wavelength anomalous dispersion (SAD) is the most attractive de novo phasing method in macromol. crystallog., as it directly utilizes intrinsic anomalous scattering from native crystals. However, the success of such an experiment depends on accurate measurements of the reflection intensities and therefore on careful data-collection protocols. Here, the low-dose, multiple-orientation data-collection protocol for native SAD phasing developed at beamline X06DA (PXIII) at the Swiss Light Source is reviewed, and its usage over the last four years on conventional crystals (>50μm) is reported. Being exptl. very simple and fast, this method has gained popularity and has delivered 45 de novo structures to date (13 of which have been published). Native SAD is currently the primary choice for exptl. phasing among X06DA users. The method can address challenging cases: here, native SAD phasing performed on a streptavidin-biotin crystal with P21 symmetry and a low Bijvoet ratio of 0.6% is highlighted. The use of intrinsic anomalous signals as sequence markers for model building and the assignment of ions is also briefly described. The experimental part of the paper was very detailed, including the reaction process of 5-((3aS,4S,6aR)-2-Oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanoic acid(cas: 58-85-5Recommanded Product: 5-((3aS,4S,6aR)-2-Oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanoic acid)
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Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem