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Guanine in Medical News

DNA editing tool flips its target

... differentiated cells." In mammalian cells, methylation usually appears on double stranded DNA where the nucleotide Cytosine (C) is followed by guanine (G). The complementary sequence on the opposite strand is also C then G, and the methylation appears on both Cs. When a cell is copying its DNA, a ...

Advances in drug screening: building a better haystack for the needles of tomorrow

... the chromosome that keep the DNA from fraying at the ends. The telomere consists of a short repeated segment of six DNA nucleotide subunits thymine, guanine and adenine in the order of TTAGGG. Gradually, telomeres erode, a trait that has evolved to enforce a cells mortality: a cell can only grow and ...

Study reveals how stem cells decide to become either skeletal or smooth muscle

... regulatory sequence: the CArG box. The nucleotide building blocks of DNA chains may contain any one of four nucleobases: adenine (A), thymine (T), guanine (G) and cytosine (C). Any sequence of code starting with 2 Cs, followed by any combination of 6 As or Ts, and ending in 2 Gs is a CArG box. According ...

Enzyme's second messenger contributes to cell overgrowth

... after which they can be switched off until another signal is received. G proteins are a commonly used form of switch, activated by the binding of guanine nucleotides. PLCs normal role is delivering signals from outside the cell to inside the cell by generating second messengers that tell cells to ...

Elusive Step In DNA Mutation Uncovered By Researchers

... information about how water reacts with the guanine of the ionized DNA, a critical step in DNA ... now, the mechanism by which water reacts with the guanine of the ionized DNA remained a puzzle. Through our ... said. Once the hole is settled on the two guanine bases, water molecules react with one of the ...

Viagra may Be Useful for Treating Jet Lag

... the treatment of high blood pressure and angina, works by interfering with an enzyme that reduces levels of a naturally-occurring compound, cyclic guanine monophosphate (cGMP). In the brain, cGMP has a vital function in a signalling pathway that regulates the circadian cycle, the body's daily ...

Researchers from Emory University Undertake A New Genetic Mapping

... of chemical building blocks that appear in pairs. They explained that these blocks come in four types: adenine (A), thymine (T), cystosine (C), and guanine (G). The scientists have since then have been concentrating their attention for mapping the tiny variations in the genetic code of an ...

Controversial Theory Says DNA Can Be Pushed To "Dark States"

... have helped lead to the evolution of life." The core of the debate, Kong said, relates to the behavior of the nucleic acid bases – adenine, thymine, guanine and cytosine - that as A-T and G-C base pairs form DNA and ultimately become the blueprint for all living things. One of the most basic premises of ...

Mutation connected to Osteoporosis

... rice-like bone fragments that grow in various organs in the body. He said DNA from the patients revealed 13 of the 18 shared a GNAS1 mutation -- guanine nucleotide binding protein alpha stimulating activity polypeptide. GNAS1 controls a protein that plays a critical role in way cells function. In the ...
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