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The following other wikis use this file: Usage on bn.wikipedia.org অ্যামিনো অ্যাসিড; Usage on en.wikiversity.org Organic Chemistry – Carbon Chemistry and Macromolecules
An example of an amino acid sequence plotted on a helical wheel. Aliphatic residues are shown as blue squares, polar or negatively charged residues as red diamonds, and positively charged residues as black octagons. A helical wheel is a type of plot or visual representation used to illustrate the properties of alpha helices in proteins.
An aminoacyl-tRNA, with the tRNA above the arrow and a generic amino acid below the arrow. Most of the tRNA structure is shown as a simplified, colorful ball-and-stick model; the terminal adenosine and the amino acid are shown as structural formulas. The arrow indicates the ester linkage between the amino acid and tRNA.
Protein structure is the three-dimensional arrangement of atoms in an amino acid-chain molecule. Proteins are polymers – specifically polypeptides – formed from sequences of amino acids, which are the monomers of the polymer. A single amino acid monomer may also be called a residue, which indicates a
The incorporation of these nonstandard amino acids is rare. For example, 25 human proteins include selenocysteine in their primary structure, [64] and the structurally characterized enzymes (selenoenzymes) employ selenocysteine as the catalytic moiety in their active sites. [65] Pyrrolysine and selenocysteine are encoded via variant codons.
By this method, body diagrams can be derived by pasting organs into one of the "plain" body images shown below. This method requires a graphics editor that can handle transparent images, in order to avoid white squares around the organs when pasting onto the body image. Pictures of organs are found on the project's main page. These were ...