integrin

This term is used exclusively within specialized biological and medical contexts, specifically in cell biology and pathology. It describes a family of proteins that act as the physical bridge between the intracellular cytoskeleton and the extracellular matrix, making it a technical term of art rather than a word for general conversation.

Because it refers to a specific class of proteins, it is treated as a countable noun in scientific literature. Researchers frequently discuss different "integrins" or "integrin subtypes" when referring to the various combinations of alpha and beta subunits that form these receptors.