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Typical protein profiles of 2D PAGE for tissue-engineered cartilage constructed by ASCs and normal porcine cartilage. Three 2-D electrophoresis gels after silver staining are shown here as representatives. (A) Tissue-engineered cartilage of 6 months; (B) normal cartilage served as positive control. Identified proteins are listed in Table 5. Horizontal axes designate the pH value, and vertical axes designate molecular mass.
