Fig. 2From: Rapid detection of colistin resistance protein MCR-1 by LC–MS/MSLC-MS chromatograms of a DTFPQLAK, b SVPAFFWTDK and c ADHVSFNGYER for two representative mcr-1-containing isolates (P1 and P2) and two negative controls (N1 and N2) used for method development. The rdotp/R-ratio for each peptide is shown in the respective box. Additional related data are contained in Additional file 1: Fig. S2a–cBack to article page