This image illustrates the general structure of an amino acid.The central carbon atom (C) is bonded to a hydrogen atom (H), an amino group (NH2), a carboxyl group (COOH), and a variable side chain (R ...

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.

Each protein is a molecule made up of different combinations of 20 types of smaller, simpler amino acids. Protein molecules are long chains of amino acids that are folded into a three-dimensional ...

The specific structure of a protein determines its unique biological function. (click on image to enlarge) (Image: National Human Genom Research Institute) Proteins are built from a set of 20 standard ...

Scientists have long believed they understood how life’s genetic code evolved, but new research upends that assumption. By ...

Scientists have discovered numerous organic compounds in samples from the asteroid Bennu, including key amino acids and the ...

(Hint: It’s a lot.) A biggie as of late? Amino acids, which are the building blocks of protein. The 11 amino acids our bodies synthesize are called “nonessential,” but we need nine others (k ...