The structure of collectins is unique and consists of three main parts: a collagen-like domain, a neck region, and a carbohydrate recognition domain (CRD). The collagen-like domain allows for the formation of trimeric or hexameric structures, which are necessary for their function. The neck region connects the collagen-like domain to the CRD, which is responsible for binding to specific carbohydrates on the surface of pathogens.
