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Fig. 6. Characterization of Tam-induced Cre recombinase activity in the surface
ectoderm and forming epidermis of K14-Cre-ERT2 transgenic
mice. (A) Whole-mount X-Gal-stained E10.5
K14-Cre-ERT2(tg/0)/ROSAfl/+ embryo
after (a) oil and (b) 0.1 mg Tam injection to a female at E9.0. fl, forelimb;
hl, hindlimb; p, first pharyngeal arch. (B) X-Gal-stained dorsal skin sections
of E12.5 (a,b), E14.5 (c,d) and E18.5 (e,f)
K14-Cre-ERT2(tg/0)/ROSAfl/+ fetuses
after daily injections of oil (a,c,e) or Tam (b,d,f) to females from
E9.5-E11.5 (a,b), E 9.5-E13.5 (c,d) and E12.5-E16.5 (e,f) days gestation.
Sections were counterstained with safranin. E, epidermis; D, dermis; hb, hair
bulb. Scale bar in a: 16 µm.