Representative mass spectrometry and detection of antigens in MN. Case 1 is from a biopsy specimen of PLA2R-associated MN, case 2 from THSD7A-associated MN, case 3 from EXT1/EXT2-associated MN, case 4 from NELL1-associated MN, case 5 from Sema3B-associated MN, and case 6 from PCDH7-associated MN. Numbers in green boxes represent spectral counts of MS/MS matches to a respective protein. Red star indicates shared amino acid sequences among proteins.