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 ...

Each cell in your body relies on precise communication with other cells to function properly. At the center of this process ...

Amyloid precursor protein (APP) plays a central role in Alzheimer ... Here we describe the 1.8 Å resolution crystal structure of the N-terminal, heparin-binding domain of APP (residues 28 ...

A protein called HER3, which is present on the blood–brain barrier, helps the tumour-invading protein cross from the ...