Figure 2

Age relationship of isomerized aspartate (IsoAsp) levels in cartilage extracts. (a) IsoAsp levels in cartilage extracts of non-osteoarthritis (non-OA) trauma cartilages. (b) IsoAsp levels in cartilage extracts from non-lesioned OA areas. (c) IsoAsp levels in cartilage extracts from OA lesion areas. NS, not significant.