The purine structure consists of a pyrimidine ring (positions 1 to 6) fused to an imidazole ring (positions 7 to 9). Adenine and guanine, the two most common purines in DNA and RNA, share this core ...

ACIDIC degradation has been widely used to determine the distribution of the pyrimidine nucleotides in deoxyribonucleic acids (DNA; I ... is the hydrolysis of the purine glycosidic linkages ...

These nucleotides can then be further processed to form the pyrimidine bases found in DNA and RNA. The pyrimidine biosynthetic pathway is tightly regulated to ensure the proper balance of nucleotides ...

Scientists detected all five nucleobases -- building blocks of DNA and RNA -- in samples returned from asteroid Bennu by NASA's OSIRIS-REx mission.

studying the structural properties of nucleic acids containing modified pyrimidine and purine bases and the design and synthesis of modified oligodeoxyribonucleotides for DNA-DNA and DNA-protein cross ...

Among the findings, the Japanese contributors detected all five nitrogenous bases, molecules required for building DNA and RNA ... The research team observed that the ratio of purines (adenine and ...

By Sage Rohrbach A mosaic image of the Bennu Asteriod, created using pictures from NASA’s OSIRIS-REx satellite that was near the asteroid for over two years. Courtesy of NASA via Wikimedia ...

Japanese collaborators detected all five nucleobases — building blocks of DNA and RNA — in samples returned from asteroid ...

The double helical structure is made of two strands consisting of deoxyribose and phosphate and is held together by bonds between purine and pyrimidine bases which project inward from two chains and .