DNA sequence
DNA sequence: The precise ordering of the bases (A, T, G, C) from which DNA is composed. Base pairs form naturally only between A and T and between G and C, so the base sequence of each single strand of DNA can be simply deduced from that of its partner strand. The DNA nucleotide code is in triplets, such as ATG; the base sequence of ATG’s partner strand would be TAC.
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- DNA sequence, draft
DNA sequence, draft: Sequence of a DNA with less accuracy than a finished sequence. In a draft sequence, some segments are missing or are in the wrong order or are oriented incorrectly. A draft sequence is as opposed to a finished DNA sequence.
- DNA sequence, finished
DNA sequence, finished: A DNA sequence in which the bases are identified to an accuracy of no more than 1 error in 10,000 and are placed in the right order and orientation along a chromosome with almost no gaps. A finished sequence is as opposed to a draft DNA sequence.
- DNA technology, recombinant
DNA technology, recombinant: A series of procedures used to join together (recombine) DNA segments. A recombinant DNA molecule is constructed (recombined) from segments from 2 or more different DNA molecules. Under certain conditions, a recombinant DNA molecule can enter a cell and replicate there, autonomously (on its own) or after it has become integrated into […]
- DNA virus
DNA virus: A virus in which the genetic material is DNA rather than RNA. The DNA may be either double- or single-stranded. Major groups of double-stranded DNA viruses (class I viruses) include the adenoviruses, the herpes viruses, and the poxviruses. Major groups of single-stranded DNA viruses (class II viruses) include the parvoviruses and coliphages.
- DNA, coding
DNA, coding: A sequence of DNA that codes for protein. Coding DNA sequences are separated by long regions of DNA called introns that have no apparent function. Coding DNA is also known as an exon.