Chinese Hamster Ovary cell line, CHO-derived human Plexin B1 protein Leu20-Gln535, with a C-terminal 6-His tag
>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
<0.10 EU per 1 μg of the protein by the LAL method.
N-terminal sequence Analysis
Predicted Molecular Mass
60-68 kDa, under reducing conditions
Measured by its binding ability in a functional ELISA. When Recombinant Human Plexin B1 His-tag is coated at 1.00 µg/mL (100 μL/well), Recombinant Human Semaphorin 4D Fc Chimera (Catalog # 7470-S4) binds with an ED50 of 80.0-480 ng/mL.
Recombinant Human Plexin B1 (Sema domain) His Protein, CF Scientific Data Examples
Recombinant Human Plexin B1 His-tag Protein SDS-PAGE.
2 μg/lane of Recombinant Human Plexin B1 His-tag (Catalog # 10803-PB) was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Blue staining, showing bands at 60-68 kDa.
Recombinant Human Plexin B1 (Sema domain) His-tag Protein Binding Activity
When Recombinant Human Plexin B1 (Sema domain) His-tag (Catalog # 10803-PB) is coated at 1.00 µg/mL (100 μL/well), Recombinant Human Semaphorin 4D Fc Chimera [[catalogNumber:(7470-S4)]] binds with an ED50 of 80.0-480 ng/mL.
Formulation, Preparation and Storage
What does CF mean?
CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our
Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant
protein to be stored at a more dilute concentration.
The carrier free version does not contain BSA.
What formulation is right for me?
In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or
as an ELISA standard.
In contrast, the carrier free protein is recommended for applications, in which the presence of BSA
Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitute at 1.00 mg/mL in PBS.
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
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.
3 months, -20 to -70 °C under sterile conditions after reconstitution.
Background: Plexin B1
Plexin B1, also known as SEP, is a type I transmembrane glycoprotein that belongs to the Plexin family of semaphorin receptors. In humans, the Plexin family consists of at least nine members divided into four subfamilies and Plexin signaling is involved in neuronal axon guidance, angiogenesis and immune response (1). Plexins share a common structural architecture: A large extracellular domain (ECD) that binds the semaphorin ligand, a single transmembrane domain and a conserved ~600 amino acid (aa) cytoplasmic region (2, 3). Human Plexin B1 contains one Semaphorin domain, two plexin-semaphorin-integrin (PSI) domains, and three immunoglobin-plexin-transcription factor (IPT) repeats in the ECD. The mature ECD of human Plexin B1 shares 82% aa sequence identity with the ECD of mouse Plexin B1. Like semaphorins, plexins can be soluble or membrane bound and Plexin B1 can be cleaved into an ~200 kDa, soluble alpha -subunit and an ~100 kDa membrane bound beta -subunit (2). Plexin B1 is a receptor for Semaphorin 4D/CD100 and it can form a receptor complex with Neuropilins, MET, and EGF R2 (4). Plexin B1 is expressed in chick retinal ganglion neurons and hippocampal neurons with a peak during the myelination period (5). Plexin B1 also plays a role in GABAergic development, changes of actin cytoskeleton, axon guidance, cell migration, and invasive growth (6, 7).
Which Brands are Currently Available on bio‑techne.com? R&D Systems, Tocris Bioscience and ProteinSimple branded products are available to purchase through bio‑techne.com. ProteinSimple branded instruments are available to quote. ACD branded products will be available on bio‑techne.com in the near future. Novus Biologicals branded products are not currently available on bio‑techne.com and can be found at novusbio.com.
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