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Stat5 Control Cell Extracts #9353
Gallery: Stat5 Control Cell Extracts #9353
Nonphosphorylated Stat5 Cell Extracts: Total cell extracts from serum-starved HeLa cells prepared without treatment serve as a negative control. Supplied in SDS Sample Buffer. Store at -20oC.
Phosphorylated Stat5 Cell Extracts: Total cell extracts from serum-starved HeLa cells prepared with 100 ng/ml interferon-alpha 5 minute IFN-alpha treatment serve as a positive control. Supplied in SDS Sample Buffer. Store at -20oC.
Stat5 is activated in response to a wide variety of ligands including IL-2, GM-CSF, growth hormone and prolactin. Phosphorylation at Tyr694 is obligatory for Stat5 activation (1,2). This phosphorylation is mediated by Src upon erythropoietin stimulation (3). Stat5 is constitutively active in some leukemic cell types (4). Phosphorylated Stat5 is found in some endothelial cells treated with IL-3, which suggests its involvement in angiogenesis and cell motility (5). Stat5a and Stat5b are independently regulated and activated in various cell types. For instance, interferon treatment predominantly activates Stat5a in U-937 cells and Stat5b in HeLa cells (6).
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