Table 1 Proteoform level classification system

From: A five-level classification system for proteoform identifications

Levela PTMs localized PTMs identified Sequence defined Gene identified
1 Yes Yes Yes Yes
2A No Yes Yes Yes
2B Yes No Yes Yes
2C Yes Yes No Yes
2D Yes Yes Yes No
3 Two are certain and two are ambiguous
4 One is certain and three are ambiguous
5 All are ambiguous
  1. aSee Supplementary Table 1 for definitions of sub-levels.