Fig. 10.
Assay of hydroxy-alkylquinoline (HAQ) antimicrobial activity. Bacillus subtilis growth on well plates was scored for inhibition by culture extracts of PA14 and the mvfR, pqsA, and pqsE mutant strains (Left), and by purified PQS, HHQ and HQNO vs. PA14 extract (Right).