|Detection of Human Androgen R/NR3C4 by Western Blot. Western blot shows lysates of LNCaP human prostate cancer cell line. PVDF Membrane was probed with 1 µg/mL of Sheep Anti-Human/Mouse/Rat Androgen R/NR3C4 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF5876) followed by HRP-conjugated Anti-Sheep IgG Secondary Antibody (Catalog # HAF016). A specific band was detected for Androgen R/NR3C4 at approximately 115 kDa (as indicated). This experiment was conducted under reducing conditions using Immunoblot Buffer Group 8.|
The ligand binding domain of human AR (aa 661-920) shares 100% aa sequence identity with mouse and rat AR. AR (Androgen receptor) is a 99 kDa (predicted) member of the NR3 subfamily, nuclear hormone receptor family of proteins. Due to a high number of Gln and Pro residues, it runs anomalously at 100‑120 kDa in SDS-PAGE. It is widely expressed, being found in neurons, endothelial cells, osteoblasts, chrondrocytes, mascrophages, adipocytes, and prostate epithelium. Human AR is 919 amino acids (aa) in length. It contains three discrete domains: a "modulating" N‑terminus (aa 1‑553) that is rich in Gln, Pro and Gly, a Zn-finger DNA-binding region (aa 554‑635), and a ligand-binding domain (aa 672‑917). AR is highly polymorphic at the N‑terminus, with total Gln and Gly residues differing by seven or more residues among individuals. Multiple potential splice forms exist, including an alternative start site at Met189 and a seven aa substitution for aa 1‑538 that generates a 45 kDa isoform. AR does homodimerize, apparently with multiple isotypes. Over aa 661‑920, human and mouse are identical in aa sequence.
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