Anti-HER1 antibodies enable researchers to detect and measure the HER1 antigen in biological samples. This target is a reported synonym of the EGFR gene, which encodes epidermal growth factor receptor. This protein is known to function in receptor-mediated signaling pathways and cell adhesion, among other biological roles. The human version of HER1 has a canonical amino acid length of 1210 residues and a protein mass of 134.3 kilodaltons, although 4 isoforms have been identified. It is reported to be localized in the nucleus, ER, Golgi, and cell membrane of cells and widely expressed in many tissue types. Other names for this target antigen include ERBB, ERBB, and ERBB1. Some HER1 antibodies may have been used in research and have associated citations. Western Blot is a widely used application for these antibodies. In addition, ELISA is also a common application.