Fig. 4From: Osteochondrogenesis derived from synovial fibroblasts in inflammatory arthritis modelMinor population of apoptotic cells in hypertrophic chondrocytes near the growth plate in the joint. a H&E staining of 1-week-old mouse joints. b TUNEL assay in 1-week-old mouse joints. Apoptotic cells are indicated by arrows in trabecular bone (TB). There are no apoptotic cells in the hypertrophic zone (HZ). Scale bar = 100 μmBack to article page