Fig. 1.

Transcriptome changes elicited by H₂O₂ in GAS. (A) Gene expression changes (log₂) in wild-type strain 003Sm following H₂O₂ challenge at mid-exponential and late-exponential phase growth. (B and C) Comparison of gene expression changes (log₂) between wild-type and perR mutant strain 003SmperRΔ at each of the two growth phases. Data for the wild type and mutant are shown on the x axis and y axis, respectively. Broken vertical and horizontal lines represent 2-fold change in expression (log₂ = 1) that was used as a threshold value for regulated genes.