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Powder X-ray diffraction (PXRD) patterns of zinc acetate, microbeads containing native pectin, thiolated pectin, thiolated pectin−DOX conjugate synthesized by disulfide exchange reaction or disulfide formation reaction, compared to DOX-loaded microbeads; (A) LMP and (B) HMP. Note: 
= characteristic peaks of DOX, ▲ = characteristic peaks of zinc acetate.
