|Integrin beta 4/CD104 in A431 Human Cell Line. Integrin beta 4/CD104 was detected in immersion fixed A431 human epithelial carcinoma cell line using Sheep Anti-Human Integrin beta 4/CD104 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF4060) at 15 µg/mL for 3 hours at room temperature. Cells were stained using the NorthernLights™ 557-conjugated Anti-Sheep IgG Secondary Antibody (red; Catalog # NL010) and counterstained with DAPI (blue). Specific staining was localized to cell surfaces. View our protocol for Fluorescent ICC Staining of Cells on Coverslips.|
Integrin beta 4 (also known as GP150 and CD104) is a 150‑200 kDa member of the Integrin beta family. It forms noncovalent heterodimers with Integrin alpha 6 and participates in the formation of epithelial hemidesmosomes. Human Integrin beta 4 is a type I transmembrane glycoprotein that is 1795 amino acids (aa) in length. It contains a 683 aa extracellular domain (ECD) (aa 28‑710) and a large 1089 aa cytoplasmic region. Two ECD alternate splice forms may exist. One shows an 84 aa substitution for the 84 aa between aa 621‑704. A second shows a 144 aa substitution for the first 704 amino acids. Human Integrin beta 4 ECD shares 88% sequence identity with mouse Integrin beta 4 ECD.
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