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The cellular distributions of the growth factors FGF-2 and VEGF, and their receptors FGFR1, FGFR2 and FGFR3, and VEGFR-2 respectively, were visualized by immunohistochemistry and light microscopy in sections of growing red deer antler. Both of these signalling systems were widely expressed in the...
Sperm ultrastructure of five teiid lizards ( Callopistes flavipunctatus , Crocodilurus amazonicus , Dicrodon guttulatum , Dracaena guianensis , and Teius oculatus ), and the gymnophthalmid Cercosaura ocellata is described for the first time. Comparisons of sperm ultrastructure among these species...