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ScgfmRNA is expressed at the proximal end of the tibia of an 18-day postcoitum mouse fetus.[modified from(11)] Serial sections were hybridized  in situwith  scgf  [³⁵S] cRNA probes, and counterstained with  hematoxylin and eosin.
(A) Bright field image.
(B) Dark field image with the antisense probe. Conspicuous white dot signals for expression of  scgfmRNA are  
   seen in bone marrow cells (BM), proliferating chondrocytes (PC), the perichondrium and periosteum (arrows),
   but not in resting chondrocytes (RC) and hypertrophic chondrocytes (HC).
(C) Dark field image with the sense probe.