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Protein is a nutrient needed by the human body for growth and maintenance. Aside from water, proteins are the most abundant kind of molecules in the body. Protein can be found in all cells of the body and is the major structural component of all cells in the body, especially muscle. This also includes body organs, hair and skin.
Natural protein concentrates (often used in bodybuilding or as sports dietary supplements): Soy protein isolate (prepared with sodium or potassium): 80.66. Whey protein isolate: 79. Egg white, dried: 81.1. Spirulina alga, dried: 57.45 (more often quoted as 55 to 77) Baker's yeast: 38.33. Hemp husks 30.
Food pyramid (nutrition) A food pyramid is a representation of the optimal number of servings to be eaten each day from each of the basic food groups. [2] The first pyramid was published in Sweden in 1974. [3][4][5] The 1992 pyramid introduced by the United States Department of Agriculture (USDA) was called the "Food Guide Pyramid" or "Eating ...
The tables below include tabular lists for selected basic foods, compiled from United States Dept. of Agriculture (USDA) sources. Included for each food is its weight in grams, its calories, and (also in grams,) the amount of protein, carbohydrates, dietary fiber, fat, and saturated fat. [1] As foods vary by brands and stores, the figures ...
MyPlate is the latest nutrition guide from the USDA. The USDA's first dietary guidelines were published in 1894 by Wilbur Olin Atwater as a farmers' bulletin. [4] Since then, the USDA has provided a variety of nutrition guides for the public, including the Basic 7 (1943–1956), the Basic Four (1956–1992), the Food Guide Pyramid (1992–2005), and MyPyramid (2005–2013).
At the top level are all alpha proteins (domains consisting of alpha helices), all beta proteins (domains consisting of beta sheets), and mixed alpha helix/beta sheet proteins. While most proteins adopt a single stable fold, a few proteins can rapidly interconvert between one or more folds. These are referred to as metamorphic proteins. [5]
The types of food are split into five categories: [5] [6] Plenty of fruit and vegetables (at least seven portions a day). 2–3; Plenty of potatoes, bread, rice, pasta and other starchy foods. 2–3; Some milk and dairy and/or calcium fortified soy milk. 2–3; Some meat, fish, eggs and/or non-dairy sources of protein (like beans and pulses). 2–3
A protein is a polyamide. Secondary structure: regularly repeating local structures stabilized by hydrogen bonds. The most common examples are the α-helix, β-sheet and turns. Because secondary structures are local, many regions of different secondary structure can be present in the same protein molecule.