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. 2018 Jan 19;6(1):8. doi: 10.3390/medsci6010008

Figure 3.

Figure 3

Impact of lysine decarboxylase on polyamine synthesis. Genes encoding the enzymes Lys9, NspC, AguB and AguA that catalyze reactions in the polyamine biosynthesis pathways are arranged as a single operon in the genome, and Transcription of this operon is downregulated in ΔcadA. Reactions that involve multiple steps are represented by a broken arrow. We identified reduced expression of lys9, nspC, aguA and speE in ΔcadA compared to TIGR4 by qRT-PCR. Expression of Lys9 and NspC proteins were reduced in lysine decarboxylase impaired pneumococci.