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Fig. 3. Delayed development of vertebral columns in
Fosl2/ embryos. (A) Hematoxylin and Eosin
staining, in situ hybridization using type II collagen (col II) and
type X collagen (col X) antisense probes, and Ki67
immunohistochemistry on transversally sectioned primordial arches of
developing vertebrae at E14.5. Arrowheads indicate Ki67-stained cells. (B)
Hematoxylin and Eosin staining, in situ hybridization using
osteocalcin (oc, arrowheads) antisense probe, Ki67
immunohistochemistry and von Kossa staining on transversally sectioned
primordial arches of developing vertebrae at E16.5. Arrowheads indicate
Ki67-stained cells. Pictures were taken at 100x (Haematoxylin and Eosin)
and 50x (in situ hybridization, Ki67 immunohistochemistry, von Kossa
staining) magnification.