tetramer

This term is used almost exclusively within the specialized registers of biochemistry, polymer chemistry, and molecular biology. It describes a specific structural arrangement where four subunits are bound together, often serving as a building block for larger complexes or acting as a functional unit in enzymatic activity.

In a laboratory or academic context, it is frequently contrasted with other oligomers such as dimers (two units) or trimers (three units). The term implies a precise stoichiometric ratio, meaning the structure must contain exactly four monomers to be classified as such.