Origin of protein
Examples from the Web for proteins
Contemporary Examples of proteins
It causes some of my cells to express Ebola proteins to illicit an immune response.Why I Became an Ebola Vaccine Guinea Pig
September 18, 2014
Comets contain amino acids, which are organic compounds that include the raw ingredients for proteins that make for living things.Comet Surfing on a Rocket
Matthew R. Francis
August 10, 2014
Research is a living DNA chain of proteins that pass compounds along, one to the other.Writing a Novel: Even Making It Up Requires Research
July 16, 2014
All known DNA before this experiment consisted of four letters that determine what proteins a cell makes.Synthetic DNA: The New Drug Makers?
May 18, 2014
A lot of people have fish allergies, but anchovies also have a lot of amines—a breakdown product of proteins.Pizza Might Be Your Enemy
March 9, 2014
Historical Examples of proteins
Likewise, the proteins also pass through the liver on their way to the body.The Mother and Her Child
William S. Sadler
Also that there are other proteins and that the protoplasm is not all nuclein.
Antigens were considered by Ehrlich to be proteins or to be related to proteins.
Protoplasm is rich in lipoids; probably it is mainly an emulsion of these and proteins.The Organism as a Whole
The same eighteen acids are present in the proteins of all the higher animals.Physiology
Ernest G. Martin
Word Origin 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.
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.
Complex organic molecules (see also organic molecule) made up of amino acids. Proteins are basic components of all living cells and are therefore among the principal substances that make up the body. In addition to being necessary for the growth and repair of the body's tissues, proteins provide energy and act as enzymes that control chemical reactions in the cell.