Recombinant Human Blk Protein

Product Discontinued

Recombinant Human Blk Protein Summary

• Description: Recombinant protein for Human Blk
  
  

  Source:Baculovirus (Sf9 insect cells)
  Amino Acid Sequence:(P51451)

• Source: Sf 9 (baculovirus)
• Protein/Peptide Type: Recombinant Protein
• Gene: BLK
• Purity: >90%, by SDS-PAGE

Applications/Dilutions

• Dilutions:
  • Bioactivity
  • SDS-Page
• Application Notes: Specific activity: 579 nmol phosphate incorporated into Poly(Glu-Tyr) per minute per mg protein at 30C using a final concentration of 50 uM ATP (0.83 uCi/assay).
• Theoretical MW: 84 kDa.
  Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.

Packaging, Storage & Formulations

• Storage: Store at -80C. Avoid freeze-thaw cycles.
• Buffer: 50 mM Tris-HCl, pH 7.5, 150 mM NaCl, 0.25 mM DTT, 0.1 mM EGTA, 0.1 mM EDTA, 0.1 mM PMSF, 25% glycerol
• Concentration: 0.1 mg/ml
• Purity: >90%, by SDS-PAGE

Alternate Names for Recombinant Human Blk Protein

• B lymphocyte kinase
• B lymphoid tyrosine kinase
• BLK nonreceptor tyrosine kinase
• Blk
• EC 2.7.10.2
• MGC10442
• MODY11
• p55-Blk
• tyrosine-protein kinase Blk

Background

Blk, also known as B lymphoid kinase, is a 55 kd tyrosine kinases with a SH3, SH2 and catalytic domains that contain consensus sequences of the src protein tyrosine kinase family. Blk is expressed specifically in the B cell lineage and plays a role in signal transduction pathway that is restricted to B lymphoid cells (1). Stimulation of resting B-lymphocytes with antibodies to surface immunoglobulin (sIgD or sIgM) induces activation of Blk (2). Upon activation, the SH2 domain of Blk binds more than 10 distinct phosphoprotein including those of 72, 76, 115, and 130 kd (3). Blk prefers peptide substrates of the structure I/L-Y-D/E-X-L which resemble critical features of the ITAM motifs found in, e.g. the intracellular components Ig-alpha and Ig-Beta of the Beta cell receptor. Blk has a strong preference for a negatively charged amino acid in position +1 (4).

Limitations

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Peptides and proteins are guaranteed for 3 months from date of receipt.

Bioinformatics

• Gene Symbol: BLK