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细胞的分化、发育、生长和代谢适应等生物学过程都依赖于正常的基因表达,而正常的基因表达要受到有关营养素的影响。本文综述了营养素对DNA和染色质结构影响的一些初步研究。一、营养素对染色质结构的影响1.中期染色体己有研究表明,营养素的缺乏与中期染色体的结构异常有关。如缺乏Zn~(++)和Mg~(++)的孕鼠,其中期染色体常出现异常,如染色体的末端缺失,断片和裂隙。在V_(79)中国仓鼠细胞中精氨酸和赖氨酸
The biological processes such as cell differentiation, development, growth, and metabolic adaptation all depend on normal gene expression, and normal gene expression is affected by related nutrients. This article reviews some preliminary studies on the effects of nutrients on DNA and chromatin structure. First, the effect of nutrients on chromatin structure 1. There have been studies in metaphase chromosomes that the lack of nutrients is related to the structural abnormalities of metaphase chromosomes. For pregnant mice lacking Zn++ and Mg++, abnormal chromosomes often appear in the chromosomes, such as missing chromosomes, fragments and fissures. Arginine and Lysine in V_(79) Chinese Hamster Cells