Fig. 4b, Photomicrographs representing immunolocalisation for type-I collagen from pellet cultures prepared using human monolayer-expanded chondrocytes. The pellets were cultured for two days in DMEM/ITS+/TGF-β1 and subsequently maintained for 12 days in a) DMEM/10%FCS or b) DMEM/ITS+/TGF-β1 (counterstained with Harris’s haematoxylin, x132).