Figure 11.
Proposed model for β1 integrin-induced tyrosine phosphorylation of CAS. The NPXY motifs in the cytoplasmic tail of the β1-subunit are required for activation of FAK/Src, whereas the lysine in the transmembrane domain is involved in the activation of a putative PI3K-dependent tyrosine kinase leading to the tyrosine phosphorylation of CAS.