NFKBID and atrial fibrillation: Since AF is known to inhibit NF-κB signaling, we performed a correlation analysis of CA12 and NF-κB related genes and found a strong positive correlation with among others the NKFB1, NFKB2 and RELB subunits and a negative correlation with NFKBID and NKRF, which are negative regulators of NF-κB signaling (Fig. 2F).