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                            [content] => - The study investigates how the tyrosine kinase Pyk2 is involved in T cell activation and the rearrangement of the actin cytoskeleton, particularly focusing on its phosphorylation in response to T cell receptor (TCR) stimulation.*!  
- Pyk2 experiences two distinct bursts of phosphorylation following TCR activation; the first is quick and transient, while the second occurs 30-60 minutes later and does not rely on changes in the actin cytoskeleton.*!  
- The second phase of Pyk2 phosphorylation is facilitated by the enzymes Fyn and/or Lck, indicating a complex signaling mechanism downstream of TCR activation that informs T cell responses.*!
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