Release date: 2006-09-06
New optical microscopes "look at" cellular proteins American researchers say they have for the first time developed a new optical microscope that can observe proteins at the molecular level. It will help scientists explore the depths of cells and understand the basic organization of their internal structures. It is reported that the new optical microscope was developed by researchers from the Howard Hughes Medical Research Institute and the National Institutes of Health (NIH) in the United States with the help of the National Strong Magnetic Field Laboratory of Florida State University, which will help basic cellular organisms. Learning research. Michael Davidson, head of the optical microscope group at the National Strong Magnetic Field Laboratory, said that with the development of new microscope technology, it will become an important tool to unravel the mystery of intracellular dynamics at the molecular level. The new type of optical microscope is called a photosensitive positioning microscope, which makes up for the lack of electron microscopy that can only show the tiny structures in cells but not the distribution of proteins. Researchers at NIH say that if they are combined, they have a more powerful function, and people can understand the structure and protein distribution of cells at the same time. The idea of ​​a new optical microscope was proposed by two physicists at the Howard Hughes Medical Institute, Eric Beitzger and Hadid Hess, who encountered difficulties in the design process and the Davidson team eventually helped them develop A more perfect microscope. Hess said NIH researchers have found a new fluorescent protein that uses a small amount of ultraviolet light to illuminate the molecule. The Davidson team then genetically engineered the fluorescent protein in the laboratory and fused it with natural proteins. This is equivalent to labeling each protein to be studied. For the working principle of the photosensitive positioning microscope, the researchers said that they first label each molecule to be fluorescent, and then irradiate these molecules with a trace of ultraviolet light, which activates the fluorescent protein on the molecule, causing it to emit light. At this time, the image generated by the fluorescence can be captured with a microscope. In the study, the above process was repeated tens of thousands of times, and each repeated capture was only part of the protein molecule being studied. When the overall image of a protein molecule is formed, the biggest difference from the image obtained by the electron microscope is that the contrast of the observation area can be controlled. "Meddy Medical Network"
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