Figure 2.

Growth and UPE curves of oxygenated suspension cultures of C. utilis at 33°C. Time given relative to the point of half-maximum growth (from Tilbury and Quickenden, 1992). Two distinctly different phases of UPE are present: (1) UPE from exponential phase cultures (two small peaks around 0 h) and (2) UPE of post-diauxic or stationary phase cultures 40–110 h).