Anti-ESR antibodies enable researchers to detect and measure the ESR antigen in biological samples. This target is a reported synonym of the ESR1 gene, which encodes estrogen receptor 1. This protein is known to function in chromatin remodeling, among other biological roles. The human version of ESR has a canonical amino acid length of 595 residues and a protein mass of 66.2 kilodaltons, although 4 isoforms have been identified. It is reported to be localized in the cell membrane, nucleus, and cytoplasm of cells and notably expressed in the vagina, fallopian tube, endometrium, cervix, and breast. Other names for this target antigen include ER and ESRA. Western Blot is the most common application for the ESR antibodies listed below. ELISA and Immunohistochemistry are also common applications.