The linear sequence of amino acids within a protein is considered the primary structure of the protein. Proteins are built from a set of only twenty amino acids, each of which has a unique side chain.

Proteins have four levels of structure: primary (amino acid sequence), secondary (local folding patterns like alpha helices and beta sheets), tertiary (overall 3D shape), and quaternary (assembly of ...

Low-density lipoproteins (LDL) -- commonly known as bad cholesterol -- have long been on scientists' radar as a major contributor to heart disease. But these microscopic troublemakers have hidden ...

The central dogma of molecular biology suggests that the primary ... in DNA into proteins. In reality, there is much more to the RNA story. However, in the half-century since the structure of ...

Because it only takes nanoseconds to microseconds for a protein to morph along its path to its final structure, the scientists needed to slow down the process during their analysis to be able to catch ...

The sequence of amino acids in the chain determines how the chain will fold up to make the protein, so different proteins have different three-dimensional shapes. The three-dimensional shape of a ...