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In genetics, a sense strand, or coding strand, is the segment within double-stranded DNA that runs from 5' to 3', and which is complementary to the antisense strand of DNA, which runs from 3' to 5'. The sense strand is the strand of DNA that has the same sequence as the mRNA, which takes the antisense strand as its template during transcription, and eventually undergoes (typically, not always) translation into a protein. The antisense strand is thus responsible for the RNA that is later translated to protein, while the sense strand possesses a nearly identical makeup to that of the mRNA. Note that for each segment of dsDNA, there will possibly be two sets of sense and antisense, depending on which direction one reads (since sense and antisense is relative to perspective). It is ultimately

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  • Sense strand
  • 有义链
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  • DNA在转录RNA时,只有一条链会转录成RNA,与RNA序列直接拷贝的脱氧核苷酸序列(以U代替T)的DNA链则为有义链(编码链)。另一条链作RNA合成过程中核糖核苷酸碱基配对的模板,称为反义链(模板链)。
  • In genetics, a sense strand, or coding strand, is the segment within double-stranded DNA that runs from 5' to 3', and which is complementary to the antisense strand of DNA, which runs from 3' to 5'. The sense strand is the strand of DNA that has the same sequence as the mRNA, which takes the antisense strand as its template during transcription, and eventually undergoes (typically, not always) translation into a protein. The antisense strand is thus responsible for the RNA that is later translated to protein, while the sense strand possesses a nearly identical makeup to that of the mRNA. Note that for each segment of dsDNA, there will possibly be two sets of sense and antisense, depending on which direction one reads (since sense and antisense is relative to perspective). It is ultimately
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  • In genetics, a sense strand, or coding strand, is the segment within double-stranded DNA that runs from 5' to 3', and which is complementary to the antisense strand of DNA, which runs from 3' to 5'. The sense strand is the strand of DNA that has the same sequence as the mRNA, which takes the antisense strand as its template during transcription, and eventually undergoes (typically, not always) translation into a protein. The antisense strand is thus responsible for the RNA that is later translated to protein, while the sense strand possesses a nearly identical makeup to that of the mRNA. Note that for each segment of dsDNA, there will possibly be two sets of sense and antisense, depending on which direction one reads (since sense and antisense is relative to perspective). It is ultimately the gene product, or mRNA, that dictates which strand of one segment of dsDNA we call sense or antisense. But keep in mind that sometimes, such as in prokaryotes, overlapping genes on opposite strands means the sense for one mRNA can be the antisense for another mRNA. The immediate product of this transcription is a resultant initial RNA transcript, which contains a sequence of nucleotides that is identical to that of the sense strand. The exception to this is that uracil is used for nucleotide sequencing of RNA molecules rather than thymine. Most eukaryotic RNA transcripts undergo additional editing prior to being translated for protein synthesis. This process typically involves removal of introns from the initial RNA transcript, the addition of a methylated guanine nucleotide cap at the 5' end, and the addition of a poly-A tail at the 3' end. This deletion process is known as splicing. The end product is known as a mature mRNA. Prokaryotic mRNA does not undergo the same process. Strictly speaking, only the mRNA makes "sense" with the genetic code, as the translated protein peptide sequence can be directly inferred from this strand. The "antisense" strand of DNA is complementary to the "sense" strand and is the actual template for mRNA synthesis. Knowing the difference between the sense and antisense strands is important in certain molecular biology applications. For example, in microarray expression technologies, it is important to know which strand is "viewed" on the array. An array can correspond to either strand; however, a single array will be made entirely of "sense" or "antisense" strands. Identifying the different strands is also important in understanding small interfering RNAs, or siRNA.
  • DNA在转录RNA时,只有一条链会转录成RNA,与RNA序列直接拷贝的脱氧核苷酸序列(以U代替T)的DNA链则为有义链(编码链)。另一条链作RNA合成过程中核糖核苷酸碱基配对的模板,称为反义链(模板链)。
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