The defining feature of an amino acid is its side chain (at top, blue circle; below, all colored circles). When connected together by a series of peptide bonds, amino acids form a polypeptide ...

Within a protein, multiple amino acids are linked together by peptide bonds, thereby forming a long chain. Peptide bonds are formed by a biochemical reaction that extracts a water molecule as it ...

Amino acids are characterized by their central carbon atom, known as the α-carbon, which is bonded to an amino group (-NH2), a carboxyl group (-COOH), a hydrogen atom, and a variable side chain ...

View Full Profile. Learn about our Editorial Policies. Living organisms synthesize a staggering variety of proteins by combining 20 amino acids into chains of any length and order. In the past, to ...

There are about as many performance supplements on the market as there are protein-packed foods in a WH editor’s fridge. (Hint: It’s a lot.) A biggie as of late? Amino acids, which are the building ...

This study shows that the SAAR diet regulates glucose and lipid metabolism to support weight control without impacting ...

Proteins are composed of one or more chains of amino acids, which are linked together by peptide bonds and folded into specific three-dimensional structures. Proteins have four levels of structure: ...

Recent work in The EMBO Journal describes a new hybrid post-translational modification of proteins, composed of a poly-ubiquitin chain that is attached to a target protein via a mono-ADP-ribose (MAR) ...