DNA modified near infrared two region GaAs quantum dots | GaAs DNA QDs | DNA modified GaAs quantum dots

Deoxyribonucleic acid DNA Modified near infrared two region gallium arsenide GaAs Quantum dots |GaAs-DNA QDs|DNA modification GaAs Quantum dots

DNA Methylation （DNA methylation） by DNA A form of chemical modification , To be able to change DNA Under the premise of sequence , Change genetic performance . So-called DNA Methylation refers to DNA Under the action of methyltransferase , In the genome CpG Dinucleotide cytosine 5 The covalent bond at carbon position No. binds to a methyl group . A lot of research shows that ,DNA Methylation can cause chromatin structure 、DNA conformation 、DNA Stability and DNA Changes in the way it interacts with proteins , To control gene expression .

DNA The methylation reaction is divided into 2 Types . One is 2 None of the chains are methylated DNA Be methylated , It is called de novo methylation （denovo methylation）; The other is double chain DNA One of the chains of has been methylated , Another unmethylated chain is methylated , This type is called retention methylation （maintenance methylation）.

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Small make up axc,2022.07.25