PTK2 and neoplasm: In contrast, lower levels of GFP-FAK-NLS− (compared with lysates of FAK-WT tumor-bearing mice) were detected with high levels of active ERK (pERK), active JNK (pJNK), and active p38 (pp38) MAPKs in peritoneal protein lysates of FAK-NLS− tumor-bearing mice (Fig. 5G).