ARNT and Miyoshi myopathy: ARNT/HIF‐1β expression was also associated with NF‐κB activation, reflected by TRAF2 upregulation and IKKα/β phosphorylation, in MM cells either acquired drug resistance (eg, RR and DR cells; Figure 5B; parallel HIF‐1β expression shown in Figure 2B) or carrying 1q21 gain (eg, OPM‐2 and H929 cells; Figure 5C; parallel HIF‐1β expression shown in Figure 1C).