Average patterns of expression of genes involved in glycogen and trehalose a) biosynthesis, and b) degradation. The expression values of each gene are scaled to mean 0 and standard deviation 1. Average scaled expression values are shown with error bars corresponding to one standard error. For clarity, plotting positions on the x-axis are shifted slightly for each condition. c) Log. ratio of protein levels in carbon-limited culture to levels in nitrogen-limited culture versus the log. ratio of transcript levels for eight carbohydrate storage genes at D = 0.2 h-1. d) Log. ratio of protein levels at D = 0.1 h-1 to protein levels at D = 0.2 h-1 against the log. ratio of transcript levels for nitrogen-limited cultures (blue) and carbon-limited cultures (orange) for the same genes.