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Optical micrographs of the MDM crystals: in the absence of additives (A), in the presence of AFGP8 (B), AFGP1–5 (C) and DAFP1 (D), respectively. The length of the scale bars is 1 mm. The zoom-in views (150%) of the isolated MDM crystals in (C) and (D) are shown in the corresponding insets.
