Lanot R
C R Seances Soc Biol Fil. 1980;174(1):11-5.
During the 3d and 4th days of incubation the tail bud displays cell degeneration which result in the complete involution of both postanal gut and primitive streak. In spite of the degenerations the amounts of DNA, RNA and proteins are still growing. Over this period the activities of acid phosphatase and cathepsin are changing. The specific activity of phosphatase reaches a maximum when the tissue resorption is most intensive. The specific activity of cathepsin is then at its lowest level but it has passed earlier through a maximum.
在孵化的第3天和第4天，尾芽出现细胞退化，导致泄殖腔后肠和原条完全退化。尽管发生了退化，但DNA、RNA和蛋白质的量仍在增加。在此期间，酸性磷酸酶和组织蛋白酶的活性发生变化。当组织吸收最强烈时，磷酸酶的比活性达到最大值。此时组织蛋白酶的比活性处于最低水平，但它早些时候曾达到过最大值。
