https://3demmethods.i2pc.es/index.php?action=history&feed=atom&title=2023Zheng_Ultraflat2023Zheng Ultraflat - Revision history2026-05-24T20:20:56ZRevision history for this page on the wikiMediaWiki 1.44.2https://3demmethods.i2pc.es/index.php?title=2023Zheng_Ultraflat&diff=4378&oldid=prevWikiSysop: Created page with "== Citation == Zheng, Liming / Liu, Nan / Gao, Xiaoyin / Zhu, Wenqing / Liu, Kun / Wu, Cang / Yan, Rui / Zhang, Jincan / Gao, Xin / Yao, Yating / others. Uniform thin ice on..."2023-07-24T08:42:29Z<p>Created page with "== Citation == Zheng, Liming / Liu, Nan / Gao, Xiaoyin / Zhu, Wenqing / Liu, Kun / Wu, Cang / Yan, Rui / Zhang, Jincan / Gao, Xin / Yao, Yating / others. Uniform thin ice on..."</p>
<p><b>New page</b></p><div>== Citation ==<br />
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Zheng, Liming / Liu, Nan / Gao, Xiaoyin / Zhu, Wenqing / Liu, Kun / Wu, Cang / Yan, Rui / Zhang, Jincan / Gao, Xin / Yao, Yating / others. Uniform thin ice on ultraflat graphene for high-resolution cryo-EM. 2023. Nature Methods, Vol. 20, No. 1, p. 123-130 <br />
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== Abstract ==<br />
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Cryo-electron microscopy (cryo-EM) visualizes the atomic structure of macromolecules that are embedded in vitrified thin ice at their close-to-native state. However, the homogeneity of ice thickness, a key factor to ensure high image quality, is poorly controlled during specimen preparation and has become one of the main challenges for high-resolution cryo-EM. Here we found that the uniformity of thin ice relies on the surface flatness of the supporting film, and developed a method to use ultraflat graphene (UFG) as the support for cryo-EM specimen preparation to achieve better control of vitreous ice thickness. We show that the uniform thin ice on UFG improves the image quality of vitrified specimens. Using such a method we successfully determined the three-dimensional structures of hemoglobin (64 kDa), α-fetoprotein (67 kDa) with no symmetry, and streptavidin (52 kDa) at a resolution of 3.5 Å, 2.6 Å and 2.2 Å, respectively. Furthermore, our results demonstrate the potential of UFG for the fields of cryo-electron tomography and structure-based drug discovery.<br />
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== Links ==<br />
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https://www.nature.com/articles/s41592-022-01693-y<br />
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== Comments ==</div>WikiSysop