The plants were derived from two Arabidopsis parents with essentially identical genomes, but with one having a mutated DDM1 DNA methylation gene.
这些植株源自两棵基因几乎相同的拟南芥，但其中一棵含有突变的DDM1甲基化DNA。
When a methyl group attaches to a specific spot on a gene - a process called DNA methylation.
甲基附加到基因上某个特殊点的过程，称为DNA甲基化。
Discussing the relations of DNA methylation and gene transcriptional silencing takes on important significances for the study of many human diseases.
探讨DNA甲基化与基因转录抑制之间的关系，对许多人类疾病的研究具有重要意义。
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