Elucidating protein function convict dating

14-Oct-2016 19:29

The amino acids in a polypeptide chain are linked by peptide bonds.

elucidating protein function-71

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It has been estimated that average-sized bacteria contain about 2 million proteins per cell (e.g. By contrast, eukaryotic cells are larger and thus contain much more protein.

Proteins differ from one another primarily in their sequence of amino acids, which is dictated by the nucleotide sequence of their genes, and which usually results in protein folding into a specific three-dimensional structure that determines its activity.

A linear chain of amino acid residues is called a polypeptide. Short polypeptides, containing less than 20–30 residues, are rarely considered to be proteins and are commonly called peptides, or sometimes oligopeptides.

The peptide bond has two resonance forms that contribute some double-bond character and inhibit rotation around its axis, so that the alpha carbons are roughly coplanar.

The other two dihedral angles in the peptide bond determine the local shape assumed by the protein backbone.Proteins also have structural or mechanical functions, such as actin and myosin in muscle and the proteins in the cytoskeleton, which form a system of scaffolding that maintains cell shape.

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