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 ...

Exemption from the NIH Guidelines If the synthetic DNA segment is not expressed in vivo as a biologically active polynucleotide or polypeptide product, it is exempt from the NIH Guidelines. Genomic ...

Each UPC has a number designating the manufacturer (say, a soft drink company) and a specific product identifier (diet, caffeine-free, etc.). Hebert found a segment of animal DNA common to all ...

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 ...