YY1 and laryngeal carcinoma: Real‐time RT‐PCR results also showed that YY1 and MYCT1 mRNA levels were significantly higher and lower in Hep2 cells than those in HEK293T cells (P < 0.05, Fig. 1F and G), respectively, further suggesting the negative correlation between YY1 and MYCT1 at transcription level in laryngeal cancer.