Fig. 4From: Photosynthetic poly-β-hydroxybutyrate accumulation in unicellular cyanobacterium Synechocystis sp. PCC 6714Time 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)Back to article page