The phrase "a portion of DNA" is correct and usable in written English.
It can be used when referring to a specific segment or fragment of DNA in a scientific or biological context.
Example: "Researchers discovered a portion of DNA that is responsible for the trait observed in the species."
Alternatives: "a segment of DNA" or "a fragment of DNA".
Multisite collaborative efforts using genome-wide association studies (GWAS) have identified only a portion of DNA sequence-based risk factors in BD.
There are hereditary mechanisms whereby once a portion of DNA is rendered inactive in a cell it remains inactive in all of that cell's descendents.
The mutation the insertion of a portion of DNA that can "jump" to a new location within a genome occurs within cortex, a gene known to affect cell division and egg development in fruit flies.
The project, dubbed clinENCODE and announced at the Biology of Genomes meeting here last week by NHGRI's Eric Green, will involve sequencing a portion of DNA from 400 seemingly healthy volunteers to discern each person's unique genetic risk factors for disease.
In the autogenous hypothesis, mitochondria were born by splitting off a portion of DNA from the nucleus of the eukaryotic cell at the time of divergence with the prokaryotes; this DNA portion would have been enclosed by membranes, which could not be crossed by proteins.
However, since the parasite is infective as tripomastigotes but not as a portion of DNA, we cannot be sure that DNA detected by PCR in blood is a reliable surrogate of infecting T. cruzi forms.
When the DNA target was mixed with p01 in binding buffer, a portion of the DNA displayed retarded mobility in a dose-dependent manner when compared to free DNA alone (Fig. 5A).
After determination of absorbance at 260 and 280 nm, a portion of the DNA was sheared at 50,000 lbs/inch for assay of virus-specific DNA and the remainder was used for preparation of networks.
But instead of attaching single-stranded DNA to their particles, they linked "hairpins," single strands of DNA in which the end sticking out from the nanoparticle loops back and binds to a portion of the DNA closer to the particle.
While a majority of cell-free DNA circulates as histone bound nucleosomal elements [ 13, 14], at least a portion of this DNA appears to be housed with lipoprotein virtosomes or held within membranous vesicles.
Mr. Feinblatt said crime databases keep a portion of the DNA that currently does not reveal genetic traits.
