Immunostaining for Sox9, Runx2, and Msx2 of the OLF. Sox9 (a) was expressed in proliferating chondrocytes. Runx2 (b) was expressed in hypertrophic chondrocytes. Msx2 (c) was expressed in proliferating chondrocytes (scale bar = 100 μm; n.c., negative control; black arrow, hypertrophic chondrocytes; black arrowheads, proliferating chondrocytes).
Uchida et al. Arthritis Research & Therapy 2011 13:R144 doi:10.1186/ar3458