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ACTERIA respond in versatile fashion to the nutritional resources of their environment by regulating the function of their genes. Examination of the mechanisms of such regulation, mostly in Enterobacteria, has revealed the existence of specific regulatory genes and of several different patterns of control (reviewed by MAAS and MCFALL 1964). Similar regulatory mechanisms may be responsible for other aspects of cellular organization and for the development of multicellular organisms. It seems justifiable, therefore, to extend the analysis of regulation to new systems, particularly in forms other than Enterobacteria.
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Sanford A. Lacks (1968) studied this question.
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