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FT-IR spectra of PTH 1-34, PTH-ANC, MAC, and ANC depicting how their absorption peaks matched.
Abbreviations: ANC, aragonite calcium carbonate nanocrystals; FT-IR, Fourier transform infrared; MAC, micron-sized aragonite CaCO3; PTH 1-34, parathyroid hormone 1-34; PTH-ANC, PTH 1-34-loaded cockle shell aragonite calcium carbonate nanocrystals.
