A five-level classification system for proteoform identifications

Smith, LM; Thomas, PM; Shortreed, MR; Schaffer, LV; Fellers, RT; Leduc, RD; Tucholski, T; Ge, Y; Agar, JN; Anderson, LC; Chamot-Rooke, J; Gault, J; Loo, JA; Pasa-Tolic, L; Robinson, CV; Schlüter, H; Tsybin, YO; Vilaseca, M; Vizcaíno, JA; Danis, PO; Kelleher, NL