In DNA and RNA, purines pair with their complementary pyrimidine bases through hydrogen bonding ... GTP is another purine nucleotide that plays a crucial role in cellular signaling and protein ...

Many people believe that American biologist James Watson and English physicist Francis Crick discovered DNA in the 1950s ... of a single nucleotide (phosphate-sugar-base); the first to discover ...

Since dietary nucleotides are a potential source of purines for the salvage pathway, Hoxhaj’s team wondered whether supplementing mice with nucleotides could impact tumor growth. They fed ...

Cells have evolved various DNA repair mechanisms to correct such mutations. One such mechanism is base excision repair (BER), where ... It consists of an adenine nucleotide joined to a nicotinamide ...

Sunburns and aging skin are obvious effects of exposure to harmful UV rays, tobacco smoke and other carcinogens. But the effects aren't just skin deep. Inside the body, DNA is literally being torn ...

A single DNA nucleotide, the base unit of the human genome, is a tiny, tiny thing. Each one is made up of only 30 atoms (plus or minus a few, depending on the base), making it much too small to be ...