A pentamer is an entity composed of five subunits.
In chemistry, it applies to molecules made of five monomers.
In microbiology, a pentamer is one of the proteins that compose the polyhedral protein shell that encloses the bacterial micro-compartments known as carboxysomes.
In immunology, an MHC pentamer is a reagent used to detect antigen-specific CD8+ T cells.
This article about polymer science is a stub.