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单词 positive sense
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positive sense
11. Virology and Molecular Biology. Designating or relating to a nucleic acid molecule, esp. viral genomic RNA, that has a base sequence identical (or exactly corresponding, in the case of DNA) to that of messenger RNA; = plus adj. 4. Also: designating or relating to an RNA virus containing a single strand of genomic RNA of this type. Esp. in positive sense, positive strand; positive-stranded adj.
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1975 Jrnl. Gen. Virol. 28 111 Three replicative forms of RNA (RF I, RF II, and RF III) have been isolated from BHK cells infected with Similiki Forest virus... The positive strand of RFI was 42S RNA.
1977 Jrnl. Virol. 24 662/1 With other positive-stranded RNA viruses, small proteins either are cleared from a polyprotein..or..from..structural proteins.
1989 Encycl. Brit. XXIX. 520/1 A distinctive large family of single-stranded RNA viruses is called Retroviridae: the RNA of these viruses is positive.
1995 Sci. Amer. Oct. 34/3 The RNA of these viruses is ‘negative stranded’—before it can be used to make viral proteins in an infected cell, it must be converted into a positive strand by an enzyme called RNA polymerase.
2001 New Scientist 13 Oct. (Inside Sci. section) 2/3 In some cases, viral DNA can be ambisense and possess positive and negative-sense portions.
extracted from positiveadj.n.
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