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Originally posted by eileenjn at 2010-04-10 15:29:24:
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1949stone(½ð±Ò+2): 2010-04-10 15:45
³¤·æ(½ð±Ò+2): 2010-04-12 10:45
¹²¼Û¡¢±ÕºÏ¡¢»·×´DNA  
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2Â¥2010-04-10 15:29:24
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350784478(½ð±Ò+1):Õâ¸öÊÇÀÏÍâŪ³öÀ´µÄ£¬Ö»ÓÐÀÏÍâÄܽâÊ͵Ä×îÇå³þÁË£¬¸ÐлÌṩ¡£ 2010-04-10 21:48
³¤·æ(½ð±Ò+1): 2010-04-12 10:46
cccDNA (covalently closed circular DNA) is a special DNA structure that arises during the propagation of some viruses in the cell nucleus and may remain permanently there. It is a double-stranded DNA that originates in a linear form that is ligated by means of DNA ligase to a covalently closed ring. In most cases, transcription of viral DNA can occur from the circular form only. The cccDNA of viruses is also known as episomal DNA or occasionally as a minichromosome.
4Â¥2010-04-10 17:37:52
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ÒýÓûØÌû:
Originally posted by ÖñÁÖϸÓê at 2010-04-10 17:37:52:
cccDNA (covalently closed circular DNA) is a special DNA structure that arises during the propagation of some viruses in the cell nucleus and may remain permanently there. It is a double-stranded D ...

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