Origin of protein
Examples from the Web for protein
One detainee was bent over for a rectal feeding that involved Ensure, the protein shake.
Instead, opt for eating complete meals with good sources of protein and fiber.
But as a nutrition-obsessed senior at Brown University, he struggled to find a protein bar he actually liked.
Researchers have found that this protein is important in the life cycle of many types of cells, not only those in the eye.Why Men May Be More Likely to Get Deadly Brain Cancer|Dr. Anand Veeravagu, MD, Tej Azad|August 5, 2014|DAILY BEAST
After their workout I suggest a meal that is high in protein, but no limit on carbs.When Is It OK to Cheat? The Pros and Cons of Cheat Days|DailyBurn|July 14, 2014|DAILY BEAST
Some of the vegetable foods, such as peas and beans, rich in protein, are likewise not free from objection.How to Live|Irving Fisher and Eugene Fisk
Prof. Chittenden holds the opinion that the majority of people partake greatly in excess of food rich in protein.No Animal Food|Rupert H. Wheldon
The combined weight of the starch and sugar is between four and five times that of the protein.Physiology|Ernest G. Martin
Protein food for luncheon might be fish or some other meat substitute.Foods and Household Management|Helen Kinne
In other words, the human body is an engine; protein keeps it in repair; fats and carbohydrates are the fuel to run it.
British Dictionary definitions for protein
Word Origin for protein
Word Origin and History for protein
1844, from French protéine, coined 1838 by Dutch chemist Gerhard Johan Mulder (1802-1880), perhaps on suggestion of Berzelius, from Greek proteios "the first quality," from protos "first" (see proto-) + -ine (2).
Originally a theoretical substance thought to be essential to life, further studies of the substances he was working with overthrew this, but the words protein and proteid continued to be used in international work on the matter and also for other organic compounds; the modern use as a general name for a class of bodies arose in German. The confusion became so great a committee was set up in 1907 to sort out the nomenclature, which it did, giving protein its modern meaning and banishing proteid.
Medicine definitions for protein
Science definitions for protein
A Closer Look
Proteins are the true workhorses of the body, carrying out most of the chemical processes and making up the majority of cellular structures. Proteins are made up of long chains of amino acids, but they don't resemble linear pieces of spaghetti. The atoms in these long chains have their own attractive and repulsive properties. Some of the amino acids can form bonds with other molecules in the chain, kinking and twisting and folding into complicated, three-dimensional shapes, such as helixes or densely furrowed globular structures. These folded shapes are immensely important because they define the protein's function in the cell. Some protein shapes fit perfectly in cell receptors, turning chemical processes on and off, like a key in a lock, whereas others work to transport molecules throughout the body (hemoglobin's shape is ideal for carrying oxygen). When proteins fail to take on their preordained shapes, there can be serious consequences: misfolded proteins have been implicated in diseases such as Alzheimer's, mad cow, and Parkinson's, among others. Exactly how proteins are able to fold into their required shapes is poorly understood and remains a fundamental question in biochemistry., See more at prion.