In addition, we found that a higher protein level of the first glycosylation band (band 43 kDa) in lung cancer patients was correlated with lymph node metastasis (P=0.0173), while no significant changes were observed in the second and third bands (39 kDa and 37 kDa) of CTSV (Figures 3F, H, J and Supplementary Table 1). Here, CTSV is linked to lung cancer.