AGR2 and lung adenocarcinoma: Moreover, Kawamura et al. identified 81 proteins were associated with stage IA and stage IIIA lung adenocarcinoma by shotgun proteomics using formalin-fixed paraffin-embedded materials, then MRM targeted proteomic quantification was applied to verify for those protein candidates and found that Napsin-A (NAPSA) and anterior gradient protein 2 homolog (AGR2) might be the stage-related protein candidates for stage IA and IIIA lung adenocarcinoma [43].