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Table 1 Level of factors used in experimental design

From: Growth optimization and identification of an ω-transaminase by a novel native PAGE activity staining method in a Bacillus sp. strain BaH isolated from Iranian soil

Factors Symbol Coded-variable level
− 1 0 1
Temperature (°C) A 26 33 40
Agitation speed (rpm) B 120 160 216
pH C 6.7 7.7 8.5