Fig. 3From: Quantitation of glutathione S-transferases in rice (Oryza sativa L.) roots exposed to cadmium by liquid chromatography–tandem mass spectrometry using isotope-labeled wing peptides as an internal standardThe LC–MS/MS chromatograms of internal standard peptides APASVKVFGSPTSAEV*ARVLMCLF, LVDAGKTPLLAAWAER*FVEVEA before (a, b) and after (c, d) tryptic digestion. The estimated amount of peptides on column is 0.5 µgBack to article page