It was also shown the expression of CKAP2L at the mRNA level and protein level in four ESCC cell lines (TE-1, Eca109, KYSE150, KYSE450) and an oesophageal squamous epithelial cell line (Het-1A) (Figures 1(d) and 1(e)). Here, CKAP2L is linked to esophageal squamous cell carcinoma.