FRS2 in Human Liver and Liver Cancer Tissue. FRS2 was detected in immersion fixed paraffin-embedded sections of human normal liver and liver cancer tissue using Sheep Anti-Human FRS2 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF4069) at 1 µg/mL overnight at 4 °C. Tissue was stained using the Anti-Sheep HRP-DAB Cell & Tissue Staining Kit (brown; Catalog # CTS019) and counterstained with hematoxylin (blue). Specific staining was localized to cancer cell cytoplasm and cell membranes. View our protocol for Chromogenic IHC Staining of Paraffin-embedded Tissue Sections.
Preparation and Storage
Reconstitute at 0.2 mg/mL in sterile PBS.
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.
FRS2 (FGFR substrate 2; also known as SNT and FRS2-alpha ) is a 70‑90 kDa member of the FRS family of lipid-anchored docking proteins. It is an intermediary between FGF and TRK receptors and their Ras/MAPK signaling cascades. Human FRS2 is 512 amino acids (aa) in length. It contains a membrane-anchoring myristoylation signal (aa 1‑6), a PTB domain that interacts with FGF and NGF receptors (aa 13‑115), and a C-terminal Tyr-rich region that serves as a docking site for Grb2 and Shp2 (aa 196‑471). One splice form shows a deletion of the C-terminal four amino acids. Over aa 121‑449, human FRS2 is 99% and 94% aa identical to canine and mouse FRS2, respectively.