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Table 4 Steepest ascent experiments to move the experimental region towards the maximum yield of plasmid DNA vaccine pcDNA-CCOL2A1 by the engineered E. coli DH5α

From: Optimization of fermentation conditions for an Escherichia coli strain engineered using the response surface method to produce a novel therapeutic DNA vaccine for rheumatoid arthritis

Run

Peptone(g/L)

Mannitol

(g/L)

Inoculum concentration

(OD)

Plasmid yield

(mg/L)

1

22

6

0.15

296.92 ± 10.00

2

24

7

0.25

313.76 ± 8.01

3

26

8

0.35

338.57 ± 11.92

4

28

9

0.45

326.04 ± 8.65

5

30

10

0.55

303.95 ± 8.46

  1. Data are expressed as the mean ± standard deviation (SD) of 3 batches independent experiments for each strain