Fig. 3. Synovial and non-synovial joint fusion in heterozygous ColII-FGFR31^ach transgenic mice at postnatal day 30. (A,B) Section through the middle phalangeal joint of the front first digit of wild-type (A) and ColII-FGFR31^ach transgenic mice (B). The boxed region is shown at a higher magnification in C,D. (E,F) Section through the sternebrae of wild-type mice (E) and ColII-FGFR31^ach transgenic mice (F). The joints between S2, S3 and S4 in transgenic tissue are completely replaced by bone marrow.

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