|Detection of Human FHL1 by Western Blot. Western blot shows lysates of human skeletal muscle tissue and human heart tissue. PVDF membrane was probed with 0.2 µg/mL of Mouse Anti-Human FHL1 Monoclonal Antibody (Catalog # MAB5938) followed by HRP-conjugated Anti-Mouse IgG Secondary Antibody (Catalog # HAF018). A specific band was detected for FHL1 at approximately 34 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.|
|FHL1 in SH‑SY5Y Human Cell Line. FHL1 was detected in immersion fixed SH‑SY5Y human neuroblastoma cell line using Mouse Anti-Human FHL1 Monoclonal Antibody (Catalog # MAB5938) at 10 µg/mL for 3 hours at room temperature. Cells were stained using the NorthernLights™ 557-conjugated Anti-Mouse IgG Secondary Antibody (red; Catalog # NL007) and counterstained with DAPI (blue). Specific staining was localized to nuclei and cytoplasm. View our protocol for Fluorescent ICC Staining of Cells on Coverslips.|
FHL1 (Four-and-a-half LIM domains protein 1; also SLIM1 and KyoT1) is an approximately 35 kDa member of the four-and-a half class of the LIM domain-only protein family. It is highly expressed in myocardium and skeletal muscle, and is now known to bind NFATc1, promoting muscle hypertrophy. It is also noted to be a RIP140 binding partner that inhibits estrogen receptor signaling. Human FHL1 is 323 amino acids (aa) in length. It contains one C4-type Zn-finger region (aa 7-31), three distinct LIM domains (aa 40-77; 101-158; 162-212) and a bipartite NLS (aa 231-246). There is one 32 kDa splice variant that shows a 50 aa substitution for aa 231-323. This creates a fourth LIM domain. There are also alternative start sites 29 aa and 16 aa upstream of the standard site, a deletion of aa 168-296, and an 11 aa substitution for aa 81-91. Over aa 93-166, human FHL1 is 97% aa identical to mouse FHL1.
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