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. 2018 Nov 17;17:179. doi: 10.1186/s12934-018-1024-6

Fig. 5.

Fig. 5

a RRLC of analysis digestion of C6-HSL by AidP (retention time of 1.1 min). b ESI–MS analysis of the hydrolysis product of C6-HSL by AidP. Retention time of 4.8 min. UPLC fragment of enzyme-digested products showed a quasimolecular (M−H) ion substrate at m/z of 218