Figure 4From: The tryptophan pathway genes of the Sargasso Sea metagenome: new operon structures and the prevalence of non-operon organizationPhylogenetic analysis of scaffolds and contigs containing whole and complete operons. The concatenated amino acid sequences from genes trpE, trpG, trpD, and trpC were used to analyze the relationships among both known species and those from the Sargasso Sea metagenome. Full operons are written in bold whereas split operons are not.Back to article page