BioScience Dictionary

 
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Found Nitrogenous base 42 times.

Displaying results 1 to 10.

1. 5-fluorouracil (5-FU)
An anti- cancer agent similar in structure to the nitrogenous base thymine , which inhibits the enzyme dihydrofolate reductase (DHFR) and thus nucleotide synthesis, so that it is particularly harmful to rapidly growing cells such as in tumors .

2. 5-methylcytosine (5MeC)
This is the methylated form of cytosine (a nitrogenous base in nucleic acids); i.e., a methyl group has been added to the cytosine molecule.

3. 7-methyl guanosine
A guanosine ribonucleotide (has the nitrogenous base guanine attached to the sugar ribose ) which has a methyl group attached to the 7th ring atom of the guanine (a nitrogen atom). These are found at the capped 5'-ends of eukaryotic mRNA .

4. Adenine
A nitrogenous base, one member of the base pair A- T ( adenine - thymine ).

5. Adenosine
A ribonucleoside which consists of the nitrogenous base adenine linked to the sugar ribose .

6. Adenosine diphosphate (ADP)
ADP is a molecule which consists of the nitrogenous base adenine linked to the sugar ribose and which has a chain of two phosphate groups attached to the ribose in a linear fashion. ADP is used as an intermediate throughoug glycolysis . ATP hydrolyzes to produce ADP and free energy.

7. Adenosine triphosphate (ATP)
ATP is a molecule which consists of the nitrogenous base adenine linked to the sugar ribose and which has a chain of three phosphate groups attached to the ribose in a linear fashion. ATP is present in all living cells and serves as an energy source for many metabolic processes; energy is released when ATP is hydrolyzed into ADP . ATP is required for RNA synthesis since it is a direct precursor. It is the single most important molecule in all living things since it serves as the currency for energy in biological systems.

8. AT content
The percentage of nitrogenous base s on a DNA molecule which are either adenine or thymine (from a possibility of four different ones, also including cytosine and guanine ). Also see GC content .

9. Base pair (bp)
Two nitrogenous bases ( adenine and thymine or guanine and cytosine ) held together by weak bonds. Two strands of DNA are held together in the shape of a double helix by the bonds between base pairs.

10. Cytidine (cytosine riboside)
A cytosine ribonucleoside (where the nitrogenous base cytosine is linked to the sugar ribose ) which plays an important role in the metabolism of all living things.