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Fig. 6. Presence of ectopic cartilage masses near Kif3a-deficient
synchondroses. Sections of P7 and P15 control (A-C) and mutant
(D-F) synchondroses were stained with hematoxylin and Eosin (H&E)
or processed for in situ hybridization analysis of collagen II expression.
Ectopic cartilaginous masses forming in mutant specimens (arrows in D-F) are
recognizable by their typical histology and expression of collagen II. Such a
phenomenon is never observed in control specimens, in which the
chondro-perichondrial boundary is clear and unviolated (A-C). Scale bar: 75
µm in D for A-F.