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Fig. 2. Lack of a Pre-AER/AER leads to loss of Fgf10 maintenance in
mutant mouse hindimbs. Transverse sections through (A,B) E9.5
(31ss) and (C,D) E10.5 hindlimb buds. Note the lack of pre-AER (B) and
AER (D) in mutants as compared with normal controls (A,C). (E-J) Dorsal
views of whole-mount hindlimb bud region stained with the probe at the somite
stage indicated. Mutant Fgf8 expression is not induced (F). Mutant
Fgf10 expression is induced (H) but is not maintained (J).