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Fig. 9. Expanded domain of FGFR1 expression in Bmpra1CKO and
Bmpr1aCKO;1b+/- growth plates.
Immunofluorescence staining for FGFR1 in (A) wild-type, (B)
Bmpr1aCKO and (C)
Bmpr1aCKO;1b+/- distal femurs at E16.5. Intense
staining is restricted to the hypertrophic zone (arrow) in wild-type mice. In
Bmpr1aCKO mice, intense staining for FGFR1 persists in the
expanded hypertrophic zone in (arrow), but is also seen in epiphyseal and
columnar chondrocytes. A similar expansion of the domain of FGFR1 expression
is observed in Bmpr1aCKO;1b+/- growth
plates.