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Neighbor-joining tree showing phylogenetic relationships among various acyltransferases. Amino acid sequences were aligned and used to reconstruct the phylogeny. Bold lines indicate proteins whose functions have been genetically or biochemically confirmed. Numbers for open reading frames in C. aggregans, H. aurantiacus, R. castenholzii, and Roseiflexus sp. strain RS-1 are the numbers currently assigned in the draft genome sequences. E. coli, Escherichia coli.
