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. 2021 May 27;22(11):5731. doi: 10.3390/ijms22115731

Figure 7.

Figure 7

High resolution XPS spectra: (a) N1s spectra of Alg-N-AEMI (black) and Alg-N-AEMI-RGD (red); (b) high resolution S 2p spectrum shows the successful conjugation of the cysteine group of the peptide to the maleimide group of alginate via the presence of C-S-C moiety.