nuclei from gastrula or pluteus ectodermal and endodermal/mesodermal cell fractions were used to demonstrate that spec 1 and lps1 genes were transcriptionally active in ectoderm nuclei but not in endoderm/mesoderm nuclei , suggesting that in vivo the spec 1 and lps1 genes are spatially controlled at the transcriptional level .
C1183500
endodermal
C0014144
endoderm