Table 1. Methods and their respective principles for purity analysis
| Method | Principle |
|---|---|
| Isoelectric-focusing gel electrophoresis | Isoelectric point (pI) |
| Native PAGE (polyacrylamide gel electrophoresis) | Size (native form) |
| Denaturing PAGE (SDS-PAGE) | Size (denatured form) |
| Mass spectrometry (MS) | Size |
| Reversed-phase chromatography (RPC) | Hydrophobic properties |
| Size-exclusion chromatography (SEC) | Size |
