A new imaging approach for monitoring cell metabolism
Scientists at EPFL have used a new imaging technique to monitor how glucose, our main energy source, is used in the body. Their findings may have great implications for diseases like diabetes.
Scientists at EPFL have used a new imaging technique to monitor how glucose, our main energy source, is used in the body. Their findings may have great implications for diseases like diabetes.
Bio & Medicine
Oct 22, 2014
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One of the most spectacular migrations on Earth is that of the Christmas Island red crab (Gecarcoidea natalis). Acknowledged as one of the wonders of the natural world, every year millions of the crabs simultaneously embark ...
Plants & Animals
Aug 27, 2010
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Stay-at-home orders issued at the onset of the COVID-19 pandemic ushered the hoarding of food and surges in digital entertainment subscriptions, restaurant take-out and delivery services—a perfect storm for a collective ...
Plants & Animals
Jan 24, 2023
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Research has identified critical factors that enable dangerous bacteria to spread disease by surviving on surfaces in hospitals and kitchens.
Cell & Microbiology
Apr 22, 2021
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Like the human gut, the female genital tract is its own complex microbial ecosystem, where billions of beneficial bacteria make their home. The way Harvard chemist Emily Balskus sees it, the vaginal microbiome is an underappreciated, ...
Cell & Microbiology
Aug 16, 2023
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Glycogen is a molecule that serves as the secondary long-term energy storage in animal and fungal cells, with the primary energy stores being held in adipose tissue. Glycogen is made primarily by the liver and the muscles, but can also be made by glycogenesis within the brain and stomach.
Glycogen is the analogue of starch, a glucose polymer in plants, and is sometimes referred to as animal starch, having a similar structure to amylopectin but more extensively branched and compact than starch. Glycogen is a polymer of α(1→4) glycosidic bonds linked, with α(1→6)-linked branches. Glycogen is found in the form of granules in the cytosol/cytoplasm in many cell types, and plays an important role in the glucose cycle. Glycogen forms an energy reserve that can be quickly mobilized to meet a sudden need for glucose, but one that is less compact than the energy reserves of triglycerides (lipids).
In the liver hepatocytes, glycogen can compose up to eight percent of the fresh weight (100–120 g in an adult) soon after a meal. Only the glycogen stored in the liver can be made accessible to other organs. In the muscles, glycogen is found in a low concentration (one to two percent of the muscle mass). However, the amount of glycogen stored in the body—especially within the muscles, liver, and red blood cells—mostly depends on physical training, basal metabolic rate, and eating habits such as intermittent fasting. Small amounts of glycogen are found in the kidneys, and even smaller amounts in certain glial cells in the brain and white blood cells. The uterus also stores glycogen during pregnancy to nourish the embryo.
This text uses material from Wikipedia, licensed under CC BY-SA