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Fig. 3 | BMC Biotechnology

Fig. 3

From: Isolation and identification of a feather degrading Bacillus tropicus strain Gxun-17 from marine environment and its enzyme characteristics

Fig. 3

Effects of different factors on enzyme production of B. tropicus Gxun-17: a feather concentration; b fermentation temperature; c initial pH; d fermentation time; e carbon sources; f maltose concentration; g nitrogen sources; h inorganic salts; i MgSO4 concentration. Letters a, b, c, d and e indicate significance difference amongst the various treatments (P < 0.05)

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