Abstract
The receptors for the extracellular structural components fibronectin and vitronectin each consist of two subunits called alpha and beta. Using human-rodent somatic cell hybrids and cDNA probes corresponding to the alpha-subunits, we have confirmed the mapping of the fibronectin receptor (FNRA) to chromosome 12 and the vitronectin receptor (VNRA) to chromosome 2.