Recombinant Human JAM-B Protein (C-Fc)

Beta LifeScience SKU/CAT #: BL-0049NP
BL-0049NP: Greater than 95% as determined by reducing SDS-PAGE. (QC verified)
BL-0049NP: Greater than 95% as determined by reducing SDS-PAGE. (QC verified)

Recombinant Human JAM-B Protein (C-Fc)

Beta LifeScience SKU/CAT #: BL-0049NP
Our products are highly customizable to meet your specific needs. You can choose options such as endotoxin removal, liquid or lyophilized forms, preferred tags, and the desired functional sequence range for proteins. Submitting a written inquiry expedites the quoting process.

Submit an inquiry today to inquire about all available size options and prices! Connect with us via the live chat in the bottom corner to receive immediate assistance.

Product Overview

Description Recombinant Human Junctional Adhesion Molecule B is produced by our Mammalian expression system and the target gene encoding Phe29-Asn236 is expressed with a human IgG1 Fc tag at the C-terminus.
Accession P57087
Synonym Junctional Adhesion Molecule B; JAM-B; Junctional Adhesion Molecule 2; JAM-2; Vascular Endothelial Junction-Associated Molecule; VE-JAM; CD322; JAM2; C21orf43; VEJAM
Gene Background Junctional Adhesion Molecule B (JAM-B) is a single-pass type I membrane protein that belongs to the juctional adhesion molecules family. JAM-B includes a signal sequence (aa 1-28), an extracellular region (aa 29-238) with one Ig-like C2-type domain and one Ig-like V-type domain, a transmembrane segment (aa 239-259), and a cytoplasmic domain (aa 260 - 298). JAMB is localized to the tight junctions between endothelial cells or epithelial cells. JAM-B is prominently expressed in the heart, placenta, lung, foreskin and lymph node. It is also present on the endothelia of other vessels. JAM-B acts as an adhesive ligand for interacting with a variety of immune cell types and may play a role in lymphocyte homing to secondary lymphoid organs.
Molecular Mass 50.4 KDa
Apmol Mass 60-75 KDa, reducing conditions
Formulation Lyophilized from a 0.2 μm filtered solution of PBS, pH 7.4.
Endotoxin Less than 0.1 ng/µg (1 EU/µg) as determined by LAL test.
Purity Greater than 95% as determined by reducing SDS-PAGE. (QC verified)
Biological Activity Not tested
Reconstitution Always centrifuge tubes before opening. Do not mix by vortex or pipetting. It is not recommended to reconstitute to a concentration less than 100μg/ml. Dissolve the lyophilized protein in distilled water. Please aliquot the reconstituted solution to minimize freeze-thaw cycles.
Storage Lyophilized protein should be stored at ≤ -20°C, stable for one year after receipt. Reconstituted protein solution can be stored at 2-8°C for 2-7 days. Aliquots of reconstituted samples are stable at ≤ -20°C for 3 months.
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature listed below.
Usage For Research Use Only

Target Details

Target Function Junctional adhesion protein that mediates heterotypic cell-cell interactions with its cognate receptor JAM3 to regulate different cellular processes. Plays a role in homing and mobilization of hematopoietic stem and progenitor cells within the bone marrow. At the surface of bone marrow stromal cells, it contributes to the retention of the hematopoietic stem and progenitor cells expressing JAM3. Plays a central role in leukocytes extravasation by facilitating not only transmigration but also tethering and rolling of leukocytes along the endothelium. Tethering and rolling of leukocytes are dependent on the binding by JAM2 of the integrin alpha-4/beta-1. Plays a role in spermatogenesis where JAM2 and JAM3, which are respectively expressed by Sertoli and germ cells, mediate an interaction between both cell types and play an essential role in the anchorage of germ cells onto Sertoli cells and the assembly of cell polarity complexes during spermatid differentiation. Also functions as an inhibitory somatodendritic cue that prevents the myelination of non-axonal parts of neurons. During myogenesis, it is involved in myocyte fusion. May also play a role in angiogenesis.
Subcellular Location Cell membrane; Single-pass type I membrane protein. Cell junction. Cell junction, tight junction.
Protein Families Immunoglobulin superfamily
Database References
Tissue Specificity Highly expressed in heart, placenta, lung, foreskin and lymph node. Prominently expressed on high endothelial venules and also present on the endothelia of other vessels (at protein level). Also expressed in the brain in the caudate nuclei.

Gene Functions References

  1. this review briefly focuses on what is currently known about the structure, function, and mechanism of JAM-B, with particular emphasis on cancer. [review] PMID: 27121546
  2. JAM-2 may function as a putative tumour suppressor in the progression and metastasis of colorectal cancer PMID: 26782073
  3. This study showed thatJAM2 (rs2829841; intronic), associated with Alzheimer disease. PMID: 25649652
  4. Function of Jam-B/Jam-C interaction in homing and mobilization of human and mouse hematopoietic stem and progenitor cells. PMID: 24357068
  5. These data brought new evidences for the role of JAM2 and JAM3 in progression of gastric adenocarcinoma PMID: 23277282
  6. role as an adhesive ligand for interacting with a variety of immune cell types PMID: 11823489
  7. interacts with alpha4beta1; Facilitation by JAM3 PMID: 12070135
  8. Results suggest a role for junctional adhesion molecule-2 (JAM-2) in facilitating transmigration in endothelial cells PMID: 12476045
  9. Examine JAM-2 expression in normal/inflammed lymphatic endothelium. PMID: 17822725
  10. Discovery as ligand for the integrin alpha4beta1 PMID: 12070135
  11. Cloning and discovery as adhesion receptor for T cells PMID: 10945976


Please fill out the Online Inquiry form located on the product page. Key product information has been pre-populated. You may also email your questions and inquiry requests to We will do our best to get back to you within 4 business hours.

Feel free to use the Chat function to initiate a live chat. Our customer representative can provide you with a quote immediately.

Proteins are sensitive to heat, and freeze-drying can preserve the activity of the majority of proteins. It improves protein stability, extends storage time, and reduces shipping costs. However, freeze-drying can also lead to the loss of the active portion of the protein and cause aggregation and denaturation issues. Nonetheless, these adverse effects can be minimized by incorporating protective agents such as stabilizers, additives, and excipients, and by carefully controlling various lyophilization conditions.

Commonly used protectant include saccharides, polyols, polymers, surfactants, some proteins and amino acids etc. We usually add 8% (mass ratio by volume) of trehalose and mannitol as lyoprotectant. Trehalose can significantly prevent the alter of the protein secondary structure, the extension and aggregation of proteins during freeze-drying process; mannitol is also a universal applied protectant and fillers, which can reduce the aggregation of certain proteins after lyophilization.

Our protein products do not contain carrier protein or other additives (such as bovine serum albumin (BSA), human serum albumin (HSA) and sucrose, etc., and when lyophilized with the solution with the lowest salt content, they often cannot form A white grid structure, but a small amount of protein is deposited in the tube during the freeze-drying process, forming a thin or invisible transparent protein layer.

Reminder: Before opening the tube cap, we recommend that you quickly centrifuge for 20-30 seconds in a small centrifuge, so that the protein attached to the tube cap or the tube wall can be aggregated at the bottom of the tube. Our quality control procedures ensure that each tube contains the correct amount of protein, and although sometimes you can't see the protein powder, the amount of protein in the tube is still very precise.

To learn more about how to properly dissolve the lyophilized recombinant protein, please visit Lyophilization FAQs.

Recently viewed