Figure 1

Human fetal cartilage section dissected for RNA expression profiling. (A) Normal distal femur cartilage from an 18–22 week fetus. Brackets define the cartilage that was dissected and used for RNA profiling. (B) Toluidine blue stained longitudinal section of the distal head of the femur magnified 8.5 fold. The dissected portion included chondrocytes from the articular, reserve, proliferating, and hypertrophic zones.