Fig. 2From: Peptide-Mediated Tumor Targeting by a Degradable Nano Gene Delivery Vector Based on Pluronic-Modified Polyethylenimine a 1H NMR spectra of (I) Pluronic-PEI and (II) Pluronic-PEI-DR5-TAT. b IR spectra of (I) Pluronic-PEI and (II) Pluronic-PEI-DR5-TAT. c Degradation of Pluronic-PEI-DR5-TAT after incubation with buffer at 37 °C. Molecular weight (MW) was measured by gel permeation chromatography with multi-angle laser light scattering (n = 3)Back to article page