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Expression of cartilage-specific markers in 2-dimensional (2D) chondrocytes of a representative donor. Immunocytochemical analyses on P2 chondrocytes cultivated with medium containing either HS or FBS. Sections from the condyle of the same donor is shown as reference. Red: Collagen type I (Coll I), collagen type II (Coll II), proteoglycans (PG), and Sox9, respectively. Blue: Cell nuclei. Scale bars: 50 μm.
