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The pH stability assay and cumulative protein release assay of the synthesized CNP vaccine. The CNP was incubated in 1 × PBS at multiple pH’s for 6 h.
| pH stability of the CNP vaccine | |
|---|---|
| pH | Protein release (%) |
| 3.5 | 3 |
| 4.0 | 9 |
| 4.5 | 10 |
| 5.5 | 14 |
| 6.5 | 31 |
| 7.5 | 26 |
