JAK3, Control Peptide (Janus Kinase 3, EC 2.7.10.2, JAKL, Leukocyte Janus Kinase, LJAK)

Synthetic (linear) peptide (GGEEEEYFELVKKKK) used as a substrate for JAK3.

Janus Kinase 3 (Jak3) belongs to the Jak family of protein tyrosine kinases that couple to cytokine receptors and are activated by ligand binding to these receptors. Also known as Leukocyte Janus Kinase (LJak), Jak3 is activated after binding to the gamma chain of Interleukin receptors, specifically the IL-2 and IL-4 receptors. Activation of Jak3 is associated with the rapid tyrosine phosphorylation of STAT proteins. Defects in Jak3 cause an autosomal severe combined immunodeficiency disease (SCID).

Applications:
Analytical Tests: Peptide identity confirmed by MALDI-ToF MS and Amino Acid analysis.
Kinase Assay: Substrate for JAK3, active.

Storage and Stability:
Lyophilized powder may be stored at 4°C for short-term only. Stable for 12 months at -20°C. Reconstitute to nominal volume (see reconstitution instructions for peptides) and store at -20°C. For maximum recovery of product, centrifuge the original vial prior to removing the cap. Further dilutions can be made in assay buffer.