Fig. 4
From: A novel methanol-free Pichia pastoris system for recombinant protein expression
Evaluation of P AOX1 strength in Δgut1-HpGCY1-glycerol (a) and Δdak-DHA (b) systems through GFP reporter assay. GFP intensity in methanol cultured WT strain is used as a reference here. Carbon source concentrations are shown in the brackets by the mass/volume percentage. M methanol; G glycerol; DHA dihydroxyacetone