The ESR ELISA kits listed below are analytical tools for measuring concentrations of ESR in various samples. ESR is an alternative name for the human ESR1 gene, which encodes the protein, estrogen receptor 1. It has been mentioned that ESR plays a role in chromatin remodeling, among other functions. Structurally, the ESR1 protein is 595 amino acid residues in length and 66.2 kilodaltons in mass. However, as many as 4 protein isoforms have been identified. It is localized to the cell membrane, nucleus, and cytoplasm of the cell. In terms of tissue specificity, it is widely expressed across many tissue types. This protein is known to be methylated, glycosylated, ubiquitinated, palmitoylated and phosphorylated. Other names for this target antigen include ER and ESRA. Click on the following ELISA kits for more detailed information, including target reactivity and assay sensitivity.