Since opposite charges attract, the DNA is pulled in toward the histones. A nucleosome is a segment of the DNA wrapped around a core of histones. Here is a view of the double helix -- the subject ...

These groups are called the reading frame. Thus, if the number of bases removed from or inserted into a segment of DNA is not a multiple of three (Figure 4a), the reading frame transcribed to the ...

Once scientists have zeroed in on a specific segment of DNA, how do they produce enough copies of that segment for their research? In most cases, the polymerase chain reaction, or PCR, is their ...

However, initiation must be prevented at these same sites in the newly synthesized daughter chromosomes. These controls ensure that each DNA segment in the genome is duplicated in a timely fashion ...

Use the tweezers to pull out a segment of DNA from the hepatitis B virus. A subunit vaccine makes use of just a small portion of a pathogen. For a virus, the vaccine can contain just a piece of ...

The Therapeutic DNA Production Services segment consists of the enzymatic manufacture of synthetic DNA for use in the production of nucleic acid-based therapeutics and, the development and sale of ...

More specifically, the plasmid DNA vaccine carries the genetic code for a segment of pathogen or tumor antigen. The plasmid vector is taken up into cells and transcribed in the nucleus.