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Rescue effect of O. tauri and D. shibae for required B-vitamins is stable and long-term. a Log cell density of O. tauri cells at stationary phase over four sub-cultures that were inoculated at differing initial ratios to D. shibae. b The average ratio of D. shibae: O. tauri at each different starting bacterial: algal ratio at stationary phase. Error bars indicate standard error for mean of ratios at stationary phase across all sub-cultures (n = 4)
