. 2006 Oct;188(19):6786–6792. doi: 10.1128/JB.00745-06

TABLE 2.

The presence of tryptophan impacts thiamine synthesis in a yjgF mutant

Strain	Relevant genotype	Specific growth rate (μ)^a
Strain	Relevant genotype	Ade	Ade Trp	Ade Trp Thi
DM728	purF gnd	NG	NG	0.472
DM7436	purF gnd yjgF	0.433	0.408	0.446
DM8239	purF gnd trpR	0.188	0.158	0.479
DM7436	purF gnd yjgF	0.445	0.389	0.463
DM8230	purF gnd yjgF trpR	0.456	0.458	0.454
DM7435	purF gnd yjgF trpE3613	0.405	0.100	0.464
DM8229	purF gnd yjgF trpE3613 trpR	0.472	0.456	0.446

Growth studies were conducted as described in Materials and Methods. Medium contained glucose and the indicated additions. The specific growth rate was calculated by the equation ln(X/X₀)/T, where X is A₆₅₀, X₀ is A₆₅₀ at time zero, and T is time (in hours). NG, no growth (μ ≤ 0.018).