FIG. 2.

(A) LDH secretion over time detected in medium of osteochondral biopsies and cartilage-only explants; (B) ALP activity in time detected in medium of osteochondral biopsies; (C) TRAP-stained osteochondral biopsy sections before culture (C1) and after 28 days of culture (C2), arrows indicate TRAP-positive cells, scale bars indicate 200 μm. LDH, lactate dehydrogenase; TRAP, tartrate resistant acid phosphatase; ALP, alkaline phosphatase. Color images available online at www.liebertonline.com/tec