In direct ELISAs and Western blots, approximately 10% cross-reactivity with recombinant mouse ALK-1 is observed and less than 1% cross-reactivity with recombinant human (rh) Activin RIA and rhActivin RIB is observed.
Reconstitute at 0.2 mg/mL in sterile PBS.
Endoxin level is <0.10 EU per 1 µg of the antibody by the LAL method.
The TGF-beta superfamily of ligands exerts its biological activity by binding to heteromeric receptor complexes two types (I and II) of the serine/threonine kinases. ALK1, like the other type I receptors, contains a cysteine rich domain with conserved cysteine spacing in the extracellular region and a glycine and serine rich domain preceding the kinase domain. The reduced human ALK1 monomer has a calculated molecular mass of approximately 37.3 kDa. Due to glycoslyation, the recombinant human protein migrates as a 50-55 kDa protein in SDS-PAGE under reducing conditions. Human and mouse ALK1 share approximately 71% amino acid sequence identity in their extracellular domains. ALK1 is highly expressed in endothelial cells and other vascular tissues.
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Protein Aliases: activin A receptor type II-like 1; activin A receptor type IL; activin A receptor, type II-like kinase 1; Activin receptor-like kinase 1; ALK-1; Serine/threonine-protein kinase receptor R3; SKR3; TGF-B superfamily receptor type I; TSR-I
Gene Aliases: ACVRL1; ACVRLK1; ALK-1; ALK1; HHT; HHT2; ORW2; SKR3; TSR-I
UniProt ID: (Human) P37023
Entrez Gene ID: (Human) 94
Molecular Function: serine/threonine protein kinase receptor