Use of Different Isotopes in the Study of Cell Differentiation
Cytodifferentiation has important intrinsic and extrinsic determinants: factors within and from outside the cell influence the development of the cell in embryonal tissues. Two kinds of interactions between cells are possible, homotypic (between like cells) and heterotypic (between cells of unlike developmental history and potentialities). Intracellular control mechanisms on genetic and epigenetic levels will react upon input from beyond the membrane. Embryonic induction may not involve a single step at the genetic level, the direct initiation of synthesis of differentiated product, but can work at various stages of the control circuits .
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