Monoclonal antibody APA1/1 reacts with the intracellular domain of the epsilon chain of the CD3 molecule (CD3-ε). This antibody does not react with the extracellular region of CD3-ε. The assembly of the T cell antigen receptor (TCR)-CD3 complex has been suggested to take place by pairwise interactions of the CD3-ε subunit with either CD3-γ or CD3-δ. These dimers then associate with the TCR heterodimer a/β or γ/δ, and the CD3-ζ homodimer to form the full complex. Studies show that antibodies APA1/1 and SP34 gave a strong reaction with COS cells singly transfected with CD3-ε. Other anti-CD3 antibodies (OKT3, WT31, UCHT1, Leu4) did not react with COS cells singly transfected with CD3-ε. This reagent could be useful for the study of T cell development or the study of conformational changes of CD3-ε upon ligand binding to TCR-CD3 complex.
原厂资料：
注意事项：
1.This reagent has been pre-diluted for use at the recommended Volume per Test. We typically use 1 X 10e6 cells in a 100-μl experimental sample (a test).
2.Since applications vary, each investigator should titrate the reagent to obtain optimal results.
3.Caution: Sodium azide yields highly toxic hydrazoic acid under acidic conditions. Dilute azide compounds in running water before discarding to avoid accumulation of potentially explosive deposits in plumbing.
4.Store undiluted at 4°C and protected from prolonged exposure to light. Do not freeze.
5.The antibody was conjugated with APC under optimum conditions, and unconjugated antibody and free APC were removed.
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