GSK3B and nasopharyngeal carcinoma: Interestingly, we noticed that the EZH2 amino acid sequence contains several glycogen synthase kinase 3 beta (GSK3β) phosphorylation motifs (Ser/Thr-X-X-X-Ser/Thr, where X represents any amino acid) [25], and GSK3β and EZH2 interaction has been shown in nasopharyngeal cancer with unknown consequence [26].