Search results
Results from the WOW.Com Content Network
A nucleoside triphosphate is a nucleoside containing a nitrogenous base bound to a 5-carbon sugar (either ribose or deoxyribose), with three phosphate groups bound to the sugar. [1] They are the molecular precursors of both DNA and RNA , which are chains of nucleotides made through the processes of DNA replication and transcription . [ 2 ]
For some of these antimetabolites, the intracellular triphosphate form of the analog is the active compound. [36] SAMHD1 has been shown to be able to hydrolyze arabinose 5’-triphosphates. [37] SAMHD1 has been shown to be a biomarker and influence arabinose C (ara-C; cytarabine) responsiveness. [38]
Deoxyadenosine triphosphate (dATP) is a nucleotide used in cells for DNA synthesis (or replication), as a substrate of DNA polymerase. [ 1 ] Deoxyadenosine triphosphate is produced from DNA by the action of nuclease P1, adenylate kinase , and pyruvate kinase .
This nucleotide contains the five-carbon sugar deoxyribose (at center), a nucleobase called adenine (upper right), and one phosphate group (left). The deoxyribose sugar joined only to the nitrogenous base forms a Deoxyribonucleoside called deoxyadenosine, whereas the whole structure along with the phosphate group is a nucleotide, a constituent of DNA with the name deoxyadenosine monophosphate.
A ribonucleotide tri-phosphate (rNTP) is composed of a ribose sugar, 3 phosphate groups attached via diester bonds to the 5' oxygen on the ribose and a nitrogenous base attached to the 1' carbon on the ribose. rNTP's are also referred to as NTPs while the deoxyribose version is referred to as dNTPs.
Total cortisol increases to three times of non-pregnant levels by the third trimester. [5] The increased estrogen in pregnancy leads to increase corticosteroid-binding globulin production and in response the adrenal gland produces more cortisol. [5] The net effect is an increase of free cortisol. This contributes to insulin resistance of ...
There are three purposes of prenatal diagnosis: (1) to enable timely medical or surgical treatment of a condition before or after birth, (2) to give the parents the chance to abort a fetus with the diagnosed condition, and (3) to give parents the chance to prepare psychologically, socially, financially, and medically for a baby with a health problem or disability, or for the likelihood of a ...
The most common abnormality the test can screen is trisomy 21 (Down syndrome).In addition to Down syndrome, the triple and quadruple screens assess risk for fetal trisomy 18 also known as Edwards syndrome, open neural tube defects, and may also detect an increased risk of Turner syndrome, triploidy, trisomy 16 mosaicism, fetal death, Smith–Lemli–Opitz syndrome, and steroid sulfatase ...