Cyclophilin A regulates TCR signal strength in CD4+ T cells via a proline-directed conformational switch in Itk.
Colgan J, Asmal M, Neagu M, Yu B, Schneidkraut J, Lee Y, Sokolskaja E, Andreotti A, Luban J. Cyclophilin A regulates TCR signal strength in CD4+ T cells via a proline-directed conformational switch in Itk. Immunity. 2004 Aug; 21(2):189-201.