FGFR1 is over-expressed in ESCC cell lines. mRNA expression (a) and protein expression (b) of normal human esophageal mucosa cell line (Het-1A) and eight human esophageal carcinoma cell lines including KYSE-30, KYSE-180, ECA109, EC706 and TE series (TE-1, 3, 8). Data are presented as the mean ± SD; *P < 0.05 significantly different compared to each other.