Analysis of the peak area of each peptide’s signal showed some candidate autoantigens to be increased and others decreased in melanoma compared to HV sera: 11 significantly increased (TUBB, TUBB1, TUBB2A, TUBB4A, TUBB4B, H4C1, CYP17A1, YWHAZ, MASP1, DLST, PF4, AMBP) and 14 significantly decreased (CP, PLG, GSN, CLU, AHSG, ORM1, ORM2, KNG1, SERPINA1, HRG, HPX, ITIH4, HPR, HP) in patients. Here, KNG1 is linked to melanoma.