Detection of Human/Mouse/Rat HCLS1 by Western Blot. Western blot shows lysates of L1.2 mouse pro‑B cell line, Nb2‑11 rat lymphoma cell line, and Raji human Burkitt's lymphoma cell line. PVDF membrane was probed with 1 µg/mL of Human/Mouse/Rat HCLS1 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF5789) followed by HRP-conjugated Anti-Goat IgG Secondary Antibody (Catalog # HAF109). A specific band was detected for HCLS1 at approximately 75 to 80 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.
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.
HCLS1 (Hematopoietic lineage cell-specific protein; also HS1 and LckBP1) is a cytoplasmic substrate for non‑receptor type protein‑tyrosine kinases. Although its predicted MW is 54 kDa, it migrates anomalously at 75‑80 kDa in SDS-PAGE. HCLS1 is restricted to myeloid/lymphoid lineage cell types, including platelets, B cells, T cells and mast cells. HCLS1 binds to F-actin and promotes actin polymerization. It also serves as an intermediate for src-mediated signal transduction. Human HCLS1 is 486 amino acids (aa) in length. It contains one HAX1 binding site (aa 27‑66), three-plus cortactin type repeats (aa 79‑212), a coiled‑coil region (aa 215‑280) and an SH3 domain (aa 437‑484). HCLS1 is initially phosphorylated by Syk at Tyr378 and Tyr397, followed by a Src family kinase phosphorylation at Tyr222. This activates HCLS1, allowing it to interact with Ras-associated Grb2.
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