Synthesis of a New Potential Conjugated TAT-Peptide-Chitosan Nanoparticles Carrier via Disulphide Linkage

Figure 4

Raman spectrum of (a) CN (absence of S–H or S–S bond), (b) TAT-peptide (containing S–H bond at 2573.15 cm⁻¹), (c) CN–S–H end group at 2560.15 cm⁻¹, and (d) CN-TAT-peptide containing S-S bond at 545.52 cm⁻¹. S–S bond wavenumber range is between 425 and 550 cm⁻¹, and C–O–C wavenumber range is between 800 and 950 cm⁻¹[13].