CHICAGO, Dec. 18 (Xinhua) -- Researchers at Washington University School of Medicine in St. Louis have discovered a way to supercharge protein production up to a thousandfold. Proteins are built from chains of amino acids hundreds of links long. The researchers stumbled on the importance of th...
Phosphorylation introduces a charged and hydrophilic group in the side chain of amino acids, possibly changing a protein's structure by altering interactions with nearby amino acids. Some proteins such as p53 contain multiple phosphorylation...
根据第一段A protein is a large,complex macromolecule composed of one or more long chains of amino acids (氨基酸).Present in and vital to every living cell,proteins are essential for the structure,function,and regulation of the body's tissues and organs.Yet,before Frederic...
aWhey protein is rich in branched-chain amino acids (leucine, valine, isoleucine), which increase food efficiency and are an ideal protein source during metabolic stress3 乳清蛋白在branched-chain氨基酸白氨酸, (缬氨酸,异白氨酸上是富有的),增加食物效率并且是一个理想的蛋白质来源在新陈代谢的stress3期...
1、蛋白质的分子组成、结构与功能Structure and Function of Protein什么是蛋白质?蛋白质(protein)是由许多氨基酸(amino acids)通过肽键(peptide bond)相连形成的高分子含氮化合物。蛋白质研究的历史1833年,Payen和Persoz分离出淀粉酶。1838年,荷兰科学家 G. J. Mulder引入“protein”(源自希腊字proteios,意为primary...
R. Branched chain amino acids as the protein component of parenteral nutrition in cancer cachexia. Br. J. Surg., 76: 149-153, 1989.Branched chain amino acids as the protein component of parenteral nutrition in cancer cachexia. Hunter D C,Weintraub M,Blackburn G L,Bistrian B R. The ...
The chain of amino acids composing the primary structure of a peptide or protein. Linker The chemical element connecting the fatty acid to the spacer or to the peptide backbone in a fatty acid-derivatized peptide or protein. Spacer The chemical element connecting the linker and the peptide backbo...
13、tributes to the high fidely of translation. Proof-reading or editing activity,Anticodon,Function: specifies the insertion into the growing peptide chain of the amino acid carried by that tRNA. 53 Wobble hypothesis,The first base of the anticodon and the last base of the codon,Therefore,ther...
Experiments on thebiosynthesisof proteins from amino acids containing radioactivecarbonorheavy hydrogenreveal that the proteinmoleculegrows stepwise from theNterminus to the C terminus; in each step a single amino acid residue is incorporated. As soon as the growing peptide chain contains six or seven...
hemoglobinHemoglobin is a protein made up of four polypeptide chains (α1,α2,β1, and β2). Each chain is attached to a heme group composed of porphyrin (an organic ringlike compound) attached to an iron atom. These iron-porphyrin complexes coordinate oxygen molecules reversibly, an ability...