The total RNA was isolated from SCCHN tissues and cell lines using the TRIzol reagents (Invitrogen, Carlsbad, CA, USA), and cDNA was reverse transcribed using the All-in-One™ mRNA cDNA synthesis Kit (GeneCopoeia, Rockville, MD, USA) following the manufacturers’ protocols. Relative MKRN3 expression values were calculated using the 2−△△CT method and normalized using the GAPDH expression levels [14 (link), 15 (link)]. The primers used are listed in Additional file 1: Table S1.
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