CPA3 and neoplasm: Significantly higher staining levels of the proteins IGKC (Wilcoxon signed-rank test, Figures 7D–F,K; p < 0.001), IGJ (Figures 7G–I,L; p < 0.01), and CPA3 (Figures 7A–C,J; p < 0.001) were noted in the tumor adjacent normal lung tissues.