Fig. 6.

Changes of pH, ORP and NAD⁺/NADH levels under MC and HC conditions. a The pH of the medium under the light and dark conditions; b the ORP of the medium under the light and dark conditions; c total NADH and NAD⁺ pools in the cells grown under the light and dark conditions; d NADH/NAD⁺ ratios of cells grown under the light and dark conditions; e NADH amounts in the cells grown under the light and dark conditions; f NAD⁺ amounts in the cells grown under the light and dark conditions