{"product_id":"er-alpha-protein-human-ua085061","title":"ER alpha Protein, Human","description":"\u003ch4\u003eProduct Specification\u003c\/h4\u003e\u003cdiv class=\"responsive-table product-detail-table details-table\"\u003e\n\u003cbr\u003e\u003ctable style=\"width: 100%; height: auto;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22%;\"\u003e\u003cstrong\u003eSpecies\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78%;\"\u003eHuman\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22%;\"\u003e\u003cstrong\u003eSynonyms\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78%;\"\u003eESR1, ESR,NR3A1, Estradiol receptor, Nuclear receptor subfamily 3 group A member 1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22%;\"\u003e\u003cstrong\u003eAccession\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78%;\"\u003eP03372\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22%;\"\u003e\u003cstrong\u003eAmino Acid Sequence\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78%;\"\u003e\u003cp\u003eMet1-Gln116 \u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22%;\"\u003e\u003cstrong\u003eExpression System\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78%;\"\u003eE.coli\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22%;\"\u003e\u003cstrong\u003eMolecular Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78%;\"\u003e\u003cp style=\"margin-bottom: 0px;\"\u003e10-15kDa (Reducing)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22%;\"\u003e\u003cstrong\u003ePurity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78%;\"\u003e＞90% by SDS-PAGE \u0026amp; \u0026gt; 80% by HPLC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22%;\"\u003e\u003cstrong\u003eConjugation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78%;\"\u003eUnconjugated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22%;\"\u003e\u003cstrong\u003eTag\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78%;\"\u003eNo Tag\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22%;\"\u003e\u003cstrong\u003ePhysical Appearance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78%;\"\u003eLiquid\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22%;\"\u003e\u003cstrong\u003eStorage Buffer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78%;\"\u003e\u003cp\u003e50mM Tris, 200mM NaCl, 20% Glycerol, PH7.5\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22%;\"\u003e\u003cstrong\u003eStability \u0026amp; Storage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78%;\"\u003e\u003cp\u003eStable for 12 months upon stored at -80℃ from the date of receipt. And avoid repeated freeze-thaws cycles.\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22%;\"\u003e\u003cstrong\u003eReference\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 78%;\"\u003e\u003cp\u003e1.Lessey BA, Palomino WA, Apparao KB, Young SL, Lininger RA. Estrogen receptor-alpha (ER-alpha) and defects in uterine receptivity in women. Reprod Biol Endocrinol. 2006;4 Suppl 1(Suppl 1):S9.\u003cbr\u003e2.Ali S, Coombes RC. Estrogen receptor alpha in human breast cancer: occurrence and significance. J Mammary Gland Biol Neoplasia. 2000 Jul;5(3):271-81.\u003cbr\u003e3.Scobie GA, Macpherson S, Millar MR, Groome NP, Romana PG, Saunders PT. Human oestrogen receptors: differential expression of ER alpha and beta and the identification of ER beta variants. Steroids. 2002 Nov;67(12):985-92. \u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/div\u003e\u003ch4\u003eBackground\u003c\/h4\u003e\u003cdiv\u003e\u003cp\u003e\u003cspan\u003eEstrogen receptor-alpha (ERα), also known as ESR1 or NR3A1, is a ligand-dependent nuclear transcription factor belonging to the nuclear receptor superfamily. Its protein structure comprises an N-terminal transcriptional activation domain (AF-1), a central DNA-binding domain (DBD), and a C-terminal ligand-binding domain (LBD containing AF-2). Upon estrogen binding to the LBD, the receptor undergoes conformational changes that promote dimerization and binding to estrogen response elements (EREs) in target gene promoters, thereby regulating gene transcription. ERα mediates estrogen's physiological effects on target tissues including breast, uterus, and bone, promoting cell proliferation, differentiation, and metabolic regulation. Clinically, ERα serves as the most critical molecular biomarker and therapeutic target in breast cancer, with approximately 70% of breast cancer patients being ERα-positive. Endocrine therapies such as tamoxifen and aromatase inhibitors significantly improve patient outcomes by blocking ERα signaling. Furthermore, ERα expression levels correlate with malignancy and treatment response in gynecological cancers including endometrial and ovarian cancers, while aberrant expression or mutations (e.g., Y537S, D538G) are associated with endocrine therapy resistance. Consequently, ERα testing has become the cornerstone for molecular subtyping of breast cancer and personalized treatment decision-making.\u003c\/span\u003e\u003c\/p\u003e\u003c\/div\u003e","brand":"UA BIOSCIENCE","offers":[{"title":"10μg","offer_id":43093477982283,"sku":"UA085061-10μg","price":200.0,"currency_code":"USD","in_stock":true},{"title":"50μg","offer_id":43093478015051,"sku":"UA085061-50μg","price":585.0,"currency_code":"USD","in_stock":true},{"title":"100μg","offer_id":43093478047819,"sku":"UA085061-100μg","price":1000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0590\/8375\/1499\/files\/0d02017938c440e3910182cd2a0ac7cb.png?v=1788192137","url":"https:\/\/www.antbioinc.com\/products\/er-alpha-protein-human-ua085061","provider":"AntBio","version":"1.0","type":"link"}