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 ...

NASA's asteroid samples contain organic compounds and minerals that may have seeded early Earth with life's building blocks.

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

The sequence of amino acids in the chain determines how the ... form attachments and interact with many other molecules and structures inside organisms. The shape of a protein determines what ...

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

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

(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 ...

The researchers found 14 of the 20 amino acids that are used in biology to build proteins ... is where salts and minerals ...