| 单词 | Modification Methylases |
| 释义 | Modification Methylases《英文msh词典》Modification Methylases [同义词] Modification Methylases [主题词] DNA Modification Methylases [中文释义] 修饰甲基酶类 [英文释义] Enzymes that are part of the restriction-modification systems. They are responsible for producing a species-characteristic methylation pattern,on either adenine or cytosine residues,in a specific short base sequence in the host cell's own DNA. This methylated sequence will occur many times in the host-cell DNA and remain intact for the lifetime of the cell. Any DNA from another species which gains entry into a living cell and lacks the characteristic methylation pattern will be recognized by the restriction endonucleases of similar specificity and destroyed by cleavage. Most have been studied in bacterial systems,but a few have been found in eukaryotic organisms. |
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