Table 7

Genes flanking the trp operon

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

Kagan et al. Genome Biology 2008 9:R20   doi:10.1186/gb-2008-9-1-r20