SPI1 and lymphoma: Capillary immunoassay of nuclear lymphoma lysates regarding expression of AP-1 (with a focus on its components JunD and c-Jun, the latter also in its S63-phosphorylated, derepressed form51), C/EBPβ and PU.1 detected higher fold-induction of all three TF proteins in TIS compared to senescence-impaired lymphomas (Fig. 1b).