Adhesin that binds to the host cell extracellular matrix proteins fibronectin, fibrinogen, collagen, and vitronectin. Expressed in the stationary growth phase. Regulated by Sae, which is essential for emp transcription. Repressed in the presence of glucose as a result of a pH-mediated decrease in expression of sae. Also under control of both Agr and SarA. Strain Newman has emp expression enhanced compared with NCTC 8325 derivatives.