There is considerable evidence that the majority of oligosaccharides are flexible, that is, they exist in many different conformations. How, then, can they act effectively as recognition signals? There must be a mechanism to reduce this flexibility so that the high-affinity, high-specificity, bindi...
Carver JP. Oligosaccharides - How Can Flexible Molecules Act as Signals. Pure and Applied Chemistry. 1993; 65 :763–770.Carver JP (1993) Oligosaccharides: how can flexible molecules act as signals? Pure Appl Chem 65(4):763-770Carver, J. P. (1993). Oligosaccharides: How can flexible ...
That might sound weird, but it's just the way the chemistry plays out: dissolved CO2 molecules combine with water to form what's called carbonic acid, which in turn combines with carbonate to form hydrogen carbonate.可能有点危言耸听,但这是化学物质本身的特性所造成的,溶解的二氧化碳与水结合形成...
Germ cells are the only cells in the body capable of giving rise to a new organism, and this totipotency hinges on their ability to assemble membraneless germ granules. These specialized RNA and protein complexes are hallmarks of germ cells throughout their life cycle: as embryonic germ granules...
But the secret to its insulation power is in its texture.海獭毛保温的秘密在于毛的纹理。Otter fur is spiky, so it traps insulating air molecules.海獭毛尖锐,能够困住保温空气分子。And that is exactly what snowflakes do.和雪花是一样的。Powdery, fresh snow can be up to 95% trapped air.新鲜的...
Basic structure of a cucurbitacin There are 17 main molecules from cucurbitacin A to cucurbitacin T, and hundreds of compounds derived from them. Among them, cucurbitacins B, D, F, I and compounds derived from them have been extenively investigated for their anticancer activities. Advertisement ...
is that we are applying a coating of microplastic to the crops that we eat. And that comes with, you know, both the toxicity of the particle itself, but also these particles act as Trojan horses. They're carrying fecal matter, and they have been shown to have antibiotic-resistant bacteria...
science illiteracy, especially when it comes to chemistry," he explains in an email interview. "Sodium tetraborate (borax) is perfectly safe when used as directed, and it's one of the only chemicals known to link together long chains of glue molecules to make the traditional glue-based slime...
including identifying molecules on the body’s cells and beneficial bacteria. Importantly, when the body has trouble distinguishing self from non-self, chronic health conditions can present themselves and they range from allergies to autoimmune disorders, such as systemic lupus erythematosus and Multiple...
Water molecules cling to cellulose and climb along it through a process called capillary action — cellulose can even defy gravity in order to pull the water along its surface. Because water is a polar molecule, meaning one side of it holds a more positive charge and the other end a more ...