Fig. 1From: Improving the anticancer effect of afatinib and microRNA by using lipid polymeric nanoparticles conjugated with dual pH-responsive and targeting peptidesMass spectra of peptide-conjugated lipids. Mass spectra of a DSPE-PEG-H and b DSPE-PEG-R. Conjugation of peptide and DSPE-PEG-NHS was characterized by Matrix-Assisted Laser Desorption/Ionization Time-Of-Flight Mass Spectrometry (MALDI TOF MS)Back to article page