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. 2013 Nov 26;8(11):e81428. doi: 10.1371/journal.pone.0081428

Figure 4. Link between 3xGly cleavage and secretion of QS-related proteins.

Figure 4

Culture supernatants of 56 P. aeruginosa strains isolated from sputum were analyzed for LasA protease activity (A) and pyocyanin production (B). QS-related LasA cleavage activity in 3xGly cleaving P. aeruginosa strains (RF/min > 5) was compared to LasA cleavage in 3xGly non-cleaving strains (RF/min < 5) using the unpaired, two-tailed students t-test (** P < 0.01, *** P < 0.0001). A horizontal line indicates the median LasA activity /pyocyanin production.