Detection of Human ICAM‑4 by Western Blot.
Western blot shows lysates of human erythrocytes and human heart tissue. PVDF membrane was probed with 0.2 µg/mL of Sheep Anti-Human ICAM‑4 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF7179) followed by HRP-conjugated Anti-Sheep IgG Secondary Antibody (Catalog # HAF016). A specific band was detected for ICAM‑4 at approximately 42 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.
Detection of ICAM‑4 in Human Red Blood Cells by Flow Cytometry.
Human red blood cells (erythrocytes) were stained with Sheep Anti-Human ICAM‑4 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF7179, filled histogram) or isotype control antibody (Catalog # 5-001-A, open histogram), followed by Allophycocyanin-conjugated Anti-Sheep IgG Secondary Antibody (Catalog # F0127).
Detection of Human ICAM‑4 by Simple WesternTM.
Simple Western lane view shows lysates of human heart tissue, loaded at 0.2 mg/mL. A specific band was detected for ICAM‑4 at approximately 48 kDa (as indicated) using 10 µg/mL of Sheep Anti-Human ICAM‑4 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF7179) followed by 1:50 dilution of HRP-conjugated Anti-Sheep IgG Secondary Antibody (Catalog # HAF016). This experiment was conducted under reducing conditions and using the 12-230 kDa separation system.
Preparation and Storage
Sterile PBS to a final concentration of 0.2 mg/mL.
Reconstitution Buffer Available
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
Stability & Storage
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
12 months from date of receipt, -20 to -70 °C as supplied.
1 month, 2 to 8 °C under sterile conditions after reconstitution.
6 months, -20 to -70 °C under sterile conditions after reconstitution.
ICAM-4 (intercellular adhesion molecule 4; also Landsteiner-Wiener glycoprotein and CD242) is a 42 kDa member of the ICAM family, Ig superfamily of proteins. It is expressed on erythrocytes and erythroblasts, and serves as a receptor for LFA-1, Mac-1, and CD11c/CD18, plus alpha 4 beta 1 and alpha-V containing integrins. ICAM-4 is suggested to bind to Mac-1 on macrophages, allowing for its phagocytosis in senescence. Mature human ICAM-4 is a 249 amino acid (aa) type I transmembrane glycoprotein. It possesses a 218 aa extracellular region (aa 23-240) that contains two C2-type Ig-like domains (aa 62-124 and 146-217), and a 10 aa C-terminal cytoplasmic tail. ICAM-4 may form 85 kDa homodimers. There are three potential isoform variants. One shows a five aa substitution for aa 233-271, a second contains a 15 aa substitution for aa 14-29, and a third possesses a 141 aa substitution for aa 132-271. Over aa 31-240, human ICAM-4 shares 71% aa identity with mouse ICAM-4.
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