Lck(phospho-Tyr505) Antibody


Cat. No.: 38844 Categories: ,



Lymphocyte cell-specific protein-tyrosine kinase; p56-LCK; LSK; T cell-specific protein-tyrosine kinase;

Antibody Type

Polyclonal Antibody

Uniprot ID

Swiss-Prot: P06239
NCBI Protein: NP_001036236.


Peptide sequence around phosphorylation site of tyrosine 505 (G-Q-Y(p)-Q-P) derived from Human Lck.

Raised In


Species Reactivity

Human Mouse

Tested Applications

WB Recommended dilution: Predicted MW: 56kd, Western blotting: 1:500~1:1000

Background / Function

Tyrosine kinase that plays an essential role for the selection and maturation of developing T-cell in the thymus and in mature T-cell function. Is constitutively associated with the cytoplasmic portions of the CD4 and CD8 surface receptors and plays a key role in T-cell antigen receptor(TCR)-linked signal transduction pathways. Association of the TCR with a peptide antigen-bound MHC complex facilitates the interaction of CD4 and CD8 with MHC class II and class I molecules, respectively, and thereby recruits the associated LCK to the vicinity of the TCR/CD3 complex. LCK then phosphorylates tyrosines residues within the immunoreceptor tyrosines-based activation motifs (ITAMs) in the cytoplasmic tails of the TCRgamma chains and CD3 subunits, initiating the TCR/CD3 signaling pathway. In addition, contributes to signaling by other receptor molecules. Associates directly with the cytoplasmic tail of CD2, and upon engagement of the CD2 molecule, LCK undergoes hyperphosphorylation and activation. Also plays a role in the IL2 receptor-linked signaling pathway that controls T-cell proliferative response. Binding of IL2 to its receptor results in increased activity of LCK. Is expressed at all stages of thymocyte development and is required for the regulation of maturation events that are governed by both pre-TCR and mature a beta TCR. Heck E, et al. (2006) J Virol. Oct; 80(20): 9934-9942 Michie AM, et al. (2000) Mol Biol Cell. May; 11(5): 1585-1595



Storage Buffer

Supplied at 1.0mg/mL in phosphate buffered saline (without Mg2+ and Ca2+), pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol.




Shipped at 4°C. Upon delivery aliquot and store at -20°C or -80°C. Avoid repeated freeze.


Antibodies were produced by immunizing rabbits with synthetic phosphopeptide and KLH conjugates. Antibodies were purified by affinity-chromatography using epitope-specific phosphopeptide. Non-phospho specific antibodies were removed by chromatogramphy using non-phosphopeptide.



Additional information



Certificate of Analysis