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what are polymers reinforced composites
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I'm sorry, but the query "amino acid 2222 effect" seems unclear as it appears to lack context regarding a specific protein or amino acid sequence. Amino acids are the building blocks of proteins, and their sequence in a protein can greatly affect the protein's structure and function. The term "amino acid 2222" could refer to the 2222nd amino acid in a very large protein or in the context of a specific scientific study or discussion not commonly known in general or academic discourse. The effects of an amino acid change depend on its position within a protein, the nature of the change, and how it affects the protein's folding, stability, or interaction with other molecules. For accurate information or analysis, more specific details about the protein or context are required.
The primary reason we can digest starch but not cellulose lies in their molecular structures and the types of enzymes we have. Both starch and cellulose are polysaccharides made of glucose units, but their glycosidic bonds differ. Starch is primarily composed of amylose and amylopectin, linked by α-1,4 and α-1,6 glycosidic bonds, which the enzymes in the human digestive system, like amylase, can easily break down. On the other hand, cellulose has β-1,4 glycosidic bonds, forming a linear structure that human digestive enzymes, like cellulase, are incapable of breaking down. While some microbes in the guts of ruminant animals and termites can produce cellulase, humans lack these enzymes. Therefore, cellulose passes through the human digestive system as fiber, aiding in digestion but not providing nutritional value in the form of absorbable glucose.
Titanium dioxide is a well-known component found in many different items. notably sunscreens and cosmetics. It serves multiple purposes. including providing whiteness and opacity as a pigment. as well as functioning as a physical sunscreen to deflect ultraviolet light from the skin. However. the definition of active ingredient may differ depending on the specific product and its intended purpose. In the case of food or drug items. titanium dioxide is not considered an active ingredient since it does not play a role in its desired effect or use. other than adding color or texture.
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