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Characterization of collagen extracted from skins of P. olivaceus and of porcine commercial atelocollagen. (A) UV-Vis spectra of the two types of collagen; (B) Sodium dodecyl sulfate-polyacrylamide electrophoresis evidences the molecular structure and organization of two collagen; (C) Fourier transform infrared spectra of collagens exhibits the main vibrations of collagen molecular organization.
