Western blot was carried out as described previously [8] to study the expression of proteins - RPA1 and HSPH1, across HNSCC cell lines (CAL 27, FaDu and JHU-O28) compared to human normal oral keratinocyte (OKF6/TERT1) (Fig. 1B). This evidence concerns the gene HSPH1 and head and neck squamous cell carcinoma.