Figure 4From: Hypoxic conditions increase hypoxia-inducible transcription factor 2α and enhance chondrogenesis in stem cells from the infrapatellar fat pad of osteoarthritis patientsImmunohistochemistry of chondrogenic cultures of infrapatellar fat pad cells. Immunohistochemical staining for collagen type I and II, aggrecan and control IgG in cell aggregates after chondrogenic differentiation for 14 days under normoxic and hypoxic culture conditions.Back to article page