Anthranilate
synthase
component II
Trp operon
repressor
Anthranilate
synthase
component 1
Tryptophan
biosynthesis
protein trpCF
Tryptophan
synthase beta
chain
Tryptophan
synthase alpha
chain
trp operon
leader peptide
Trp operon
repressor
L-Tryptophan
L-Tryptophan
ρ-independent
terminator
operator
tRNA(Trp)
ρ-independent
terminator
tRNA(Trp)
trpD
trpC
trpB
trpA
Promoter
trpE
trpL
In the absence of
tryptophan, the repressor is
inactivated, allowing
transcription
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