Extended Data Fig. 7: Dyeing wool fabrics with chemical 6BrIG, 6BrIG cell dye, chemical indigo, and indigo cell dye.
From: Production of Tyrian purple indigoid dye from tryptophan in Escherichia coli
a, Cell dye production in a 500 mL reaction volume in a 3 L baffled glass flask. 6BrIG cell dye (left) and indigo cell dye (right) obtained by the consecutive two-cell reaction systems with and without Fre-L3-SttH expression. b, Color indicators of the wool fabrics dyed with chemical 6BrIG, 6BrIG cell dye, chemical indigo, and indigo cell dye. L*: brightness; a*: the more positive value it is, the closer it is to red, and the more negative value it is, the closer it is to green; b*: the more positive value it is, the closer it is to yellow, and the more negative value it is, the closer it is to blue. Color differences between the chemical dyes and the cell dyes were expressed as \(\Delta {\mathrm{E}}_{ab}^ \ast\), CIELAB color difference index. c, Wool fabrics (2×2 cm2) dyed with chemical indigo or the indigo cell dye, respectively. The color depth of dyed fabrics was measured in K/S values. Data are presented as mean values ± s.d. from three biologically independent samples.
