Source:http://linkedlifedata.com/resource/umls/id/C0058402
NCI: Diphtheria Toxin Receptor, encoded by the human DTR gene, is a heparin-binding EGF-like growth factor. It is mitogenic for fibroblasts and smooth muscle and may be involved in macrophage-mediated cellular proliferation. It is able to bind EGF receptors with higher affinity than EGF itself and is a far more potent mitogen for smooth muscle cells than EGF. This mature type I membrane protein is released into the extracellular space and probably binds to a receptor. (From LocusLink, Swiss-Prot and NCI)