Fig. 5

RBAST detects different tmexCD1-toprJ1 variants using the selected RNA biomarkers. Heatmap of 12 RNA biomarkers validation across tmexCD-toprJ-negative and different variants of tmexCD-toprJ-positive tigecycline-resistant after tigecycline exposure compared with their own control. The tmexCD-toprJ-negative K. pneumoniae were indicated as ‘S’, and the tigecycline-resistant K. pneumoniae carrying different tmexCD-toprJ variants were indicated as ‘R’. 16S rRNA was applied as the reference gene