Changes in Patterns of Different Enzymes

Another typical example of individual behavior of enzymes during embryonic development is shown in Fig. 78, demonstrating the dynamics of activity of four enzymes in the first week of development of the chick embryo (Moog, 1965). 

The embryonic morphogenesis of alkaline and acid phosphatases in fish (Tatarskaya et al., 1958), in the rat kidney (Pinkstaff et al., 1962), the rat lung (Zawistowska et al., 1963), the mouse brain (Lierse, 1963), the chick brain (Lee et al., 1961), in insects (Chaudhary and Lemonde, 1964), etc and of several other enzymes of phosphorus and nucleotide metabolism (Donath, 1962 Baker and 

Newburgh, 1963) has been the subject of many investigations. In this case, too, the dynamics of enzyme activity varied widely depending on the organism, and on the phase of development but the character of cell differentiation also had a strong influence on enzyme activity. 

The dynamics of activity of the enzymes concerned in amino acid activation (formation of aminoacyladenylates) has also been investigated (Maggio and Catalano, 1963 Hayashi et al., 1964 Norton et al., 1965). In this case enzyme activity was clearly correlated with intensity of protein synthesis and with growth of the 

Enzyme systems of the embryonic and postembryonic liver have been studied in particular detail from this aspect. Lea and 

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