FIG. 1.

(A) Biosynthetic pathway of HAQs in P. aeruginosa and HMAQs in Burkholderia. (B) Comparison of the P. aeruginosa PA14 (http://pseudomonas.com) region containing the pqsABCDE operon with the B. ambifaria AMMD region containing the hmqABCDEFG operon (http://burkholderia.com). Values represent identities/similarities between the different gene products of these operons. Searches for identity and similarity were performed using the BLAST algorithm (http://www.ncbi.nlm.nih.gov/BLAST/bl2seq/). ^a, indicates that, as reported in the text, HmqB exhibits identity/similarity only with the amino-terminal half of PqsB.