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Fig. 3. Expression patterns of Sox9 and type II collagen.
Hematoxylin-stained sections of E12.5 (A) control and (B) double mutant
embryos. Pattern of Sox9 expression in control (C) and double mutant
(D) section, as revealed by radioactive in situ hybridization. (E,F) Type II
collagen protein expression in E12.5 control embryo (E) and double mutant
forelimb bud (F). r, radius; u, ulna; h, humerus.