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. 2017 Jul 6;7:143. doi: 10.1186/s13568-017-0443-9

Fig. 4.

Fig. 4

Time course of growth and PHB accumulation under nitrogen and phosphorus limitation for photobioreactor cultivations of Synechocystis sp. PCC 6714 for a growth on nitrate b growth on ammonia. *The vertical bar represents the start of the limitation phase. The values shown are the mean of three individual experiments)