Bacterial Membership of Tryptophan Cohesion Groups^a

^a Each tryptophan cohesion group (TrpCG) defined by the concatenated tree for Trp proteins (Figure) is congruent with the color-coded subtree section within the 16S rRNA tree (Figure). Organisms that are included in the concatenated tree are indicated in regular type, whereas additional organisms not included in the concatenated tree but that were qualitatively determined to belong to a given TrpCG are indicated in boldface type. 
^b Intruder Members are sequences that belong to the cohesion group, but whose presence there (probably, but not necessarily, due to LGT) is incongruent with vertical genealogical expectations, as guided by 16S rRNA trees.
^c Expected Members are sequences from organisms whose inclusion in the group would be predicted on the criterion of a vertical genealogy, i.e., matching 16S rRNA subtrees.
^d Insect symbionts. 
^e The five organisms marked with asterisks(*) form a distinctive subclade that is, in fact, not a “pure” component of TrpCG-2 because of the LGT origins of trpEa and trpEb from TrpCG-3 [Ref].
^f All members of TrpCG-5 lack trpC and presumably utilize [Ref] a dual-pathway hisA (priA) for this function.