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. 2019 Aug 14;4(4):e00553-19. doi: 10.1128/mSphere.00553-19

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Copyright © 2019 Grundstad et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International license.

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FIG 1 — The USA100 agr type II system. (A) Schematic of the S. aureus agr system. (B) Structures of the AIP-I signal from USA300 strains and the AIP-II signal from USA100 strains. (C) Alpha-toxin levels from a rabbit red blood cell hemolysis assay of the 67 strains that met the inclusion criteria. The data are plotted as a percentage of activity relative to that for USA300 strain LAC, which was set to 100%. The 16 USA100 strains for which results are presented in red and green were selected for further study.