|Detection of Human/Mouse/Rat ERK2 by Western Blot. Western blot shows lysates of HeLa human cervical epithelial carcinoma cell line, MCF‑7 human breast cancer cell line, U937 human histiocytic lymphoma cell line, PC‑12 rat adrenal pheochromocytoma cell line, and NIH‑3T3 mouse embryonic fibroblast cell line. PVDF membrane was probed with 1 µg/mL of Mouse Anti-Human/Mouse/Rat ERK2 Monoclonal Antibody (Catalog # MAB1230) followed by HRP-conjugated Anti-Mouse IgG Secondary Antibody (Catalog # HAF007). A specific band was detected for ERK2 at approximately 44 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.|
|Detection of Human ERK2 by Simple WesternTM. Simple Western lane view shows lysates of HeLa human cervical epithelial carcinoma cell line and MCF‑7 human breast cancer cell line, loaded at 0.5 mg/mL. A specific band was detected for ERK2 at approximately 43 kDa (as indicated) using 10 µg/mL of Mouse Anti-Human/Mouse/Rat ERK2 Monoclonal Antibody (Catalog # MAB1230). This experiment was conducted under reducing conditions and using the 12-230 kDa separation system.|
ERK1 and ERK2 (also known as MAPK3 and MAPK1) are 44 and 42 kDa Ser/Thr kinases, respectively. They are part of the Ras-Raf-ERK signal transduction cascade often found downstream of growth factor receptor activation. ERK1 and ERK2 were initially isolated and cloned as kinases activated in response to insulin and NGF. They are expressed in most, if not all, mammalian tissues. Dual threonine and tyrosine phosphorylation activate both ERKs, at Thr202/Tyr204 for human ERK1 and Thr185/Tyr187 for human ERK2.
ERK5, also known as Big Mitogen-activated Protein Kinase 1 (BMK1) and MAPK7, is activated by several mechanisms, including receptor tyrosine kinases, G protein-coupled receptors, and osmotic stress. Like ERK1 and ERK2, ERK5 contains the conserved Thr-Glu-Tyr activation motif in its activation loop. Unlike these ERKs, however, ERK5 contains a unique C-terminal domain that regulates its activation and nuclear translocation.
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