Related topics: cells · cancer cells · protein

New cryo-EM images shed light on Wnt signaling

Using UT Southwestern's Cryo-Electron Microscopy Facility, researchers have captured images of an enzyme for Wnt lipidation, which is pivotal to human development and crucial for Wnt signaling activation. The findings, reported ...

Research team first to develop 3D structure of twinkle protein

Researchers from the National Institutes of Health have developed a three-dimensional structure that allows them to see how and where disease mutations on the twinkle protein can lead to mitochondrial diseases. The protein ...

New materials research sees transformations at an atomic level

When manufacturing techniques turn metals, ceramics or composites into a technologically useful form, understanding the mechanism of the phase transformation process is essential to shape the behavior of those high-performance ...

Mechanism of bacterial toxins in deadly attacks

Only one thousandth of a milligram of the bacterial botulinum toxin is necessary to kill a living organism. The toxin unfolds its lethal effect by preventing the release of neurotransmitters at the point where nerve cells ...

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Electron microscope

An electron microscope is a type of microscope that uses a particle beam of electrons to illuminate a specimen and create a highly-magnified image. Electron microscopes have much greater resolving power than light microscopes that use electromagnetic radiation and can obtain much higher magnifications of up to 2 million times, while the best light microscopes are limited to magnifications of 2000 times. Both electron and light microscopes have resolution limitations, imposed by the wavelength of the radiation they use. The greater resolution and magnification of the electron microscope is because the wavelength of an electron; its de Broglie wavelength is much smaller than that of a photon of visible light.

The electron microscope uses electrostatic and electromagnetic lenses in forming the image by controlling the electron beam to focus it at a specific plane relative to the specimen. This manner is similar to how a light microscope uses glass lenses to focus light on or through a specimen to form an image.

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