PPIB and cancer: As is known to all, FGF7 not only binds to HS42 but also binds to CS‐B or dermatan sulphate,43 the FGF7/FGFR2b/GAG fluorescent peaks (turquoise) in both BLMA5‐treated A549 and HCT116 cells were not the same compared to that of control peaks (purple) indicated that BLMA5 treatment changed both HS and CS structures in the two cancer cell lines.