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Table 7 Genes flanking the trp operon

From: The tryptophan pathway genes of the Sargasso Sea metagenome: new operon structures and the prevalence of non-operon organization

Gene

Number of times in the metagenome

Percent found near trp genes

TruA

30

93% are adjacent and before trpF

AccD

53

86.8% are adjacent and after trpA

9.4% are adjacent and after trpB; trpA is elsewhere

3.8% are adjacent and after trpF; trpB and A are absent

FolC

13

77% occur as trpA-accD-folC

23% occur in the order of trpB-accD-folC

PyrF

60

77% are before trpF in split operons

23% are before trpB

LexA

92

100% are adjacent and after trpC when trpF is elsewhere

MoaC

25

100% neighbor and are after trpC

PLPDE_IV

21

57% adjacent and after trpE

38% adjacent and after trpG