Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «D»:
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 splicing, alternative
DNA splicing, alternative: See Alternative splicing....
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, ...
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 (clas...
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....
DNA, junk: See: Junk DNA....
DNA, mitochondrial: Mitochondrial DNA (mtDNA) is the DNA of the mitochondrion, a structure situated in the cytoplasm of the cell rather than in the nucleus (where all the other chromosomes are located).
All mtDNA is inherited from the mother. There are 2 to 10 copies of the mtDNA genome in each mit...
DNA, nongenetic: Through the marvelous medium of the
Internet, we have discovered that DNA need not refer to deoxyribonucleic acid.
Specifically, in an e-mail entitled " A day in the life of a specialist
registrar" from Glascow, Scotland we read that in gynecology outpatient clinic, the
DNA, repetitive: DNA sequences that are repeated in the
genome. These sequences do not code for protein. One class termed highly repetitive DNA consists of short sequences, 5-100 nucleotides, repeated thousands of times in a single stretch and makes up satellite DNA. Another class termed moderately ...
DNA, satellite: DNA that contains many tandem (not
inverted) repeats of a short basic repeating unit. Satellite DNA is located at very
specific spots in the genome (on chromosomes 1, 9, 16 and the Y chromosome, the tiny short
arms of chromosomes 13-15 and 21 and 22, and near the centromeres of chrom...
DNR: Do not resuscitate. See also Advance medical directives....
DNS: On a prescription, Do Not Substitute. If a physician orders a particular drug and writes DNS on the prescription, that tells the pharmacist not to substitute a generic version or any other drug for the prescribed drug....
Do not resuscitate order
Do not resuscitate order: A request not to have cardiopulmonary resuscitation (CPR) done if the heart stops or breathing ceases.
One can use an advance directive form to make this request or one can tell the doctor to put a DNR order in the medical record. DNR orders are accepted by doctors and hos...
DOB: Abbreviation standing for the date of birth.
As examples, "DOB: 10/12/97" in the U.S. indicates the date of
birth is October 12, 1997 whereas "DOB: 10/12/97" in Great Britain
indicates the date of birth is 10 December 1997....