...The explanation for the epigenetic aspects of development is based on the fact that in multicellular organisms, individual cells are not autonomous, and that interactions between cells are inevitable. In the first half of the 20th century, when classical epigenetic theory was at its height, induction was considered a basic concept for explaining development, and it also refers to interactions between cells during development. The concept of positional information in development, which was proposed in the 1970s, is also in the same category. At present, these two different positions are not the difference between two opposing ways of thinking, and should not be contrasted as theories. ... *Some explanations of terms that mention "positional information" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
… このような発生の後成的側面の説明は,多細胞生物においては,個々の細胞は自律的でなく,細胞間の相互作用が必然的に存在する,という点に求められるのである。古典的な後成論の全盛時代である20世紀の前半において,発生の説明のための基本的概念とされてきた誘導inductionも,発生における細胞間の相互作用をいうものであり,1970年代になって提唱された発生における位置情報positional informationの概念も,同じカテゴリーのものである。 現在において,これら二つの異なった立場は対立する二つの考え方による違いではなく,学説として対比されるべきものでもない。… ※「positional information」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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