This image illustrates the chemical structure of a purine molecule, highlighting the numbering of the carbon and nitrogen atoms ... which is crucial for forming the base pairs in nucleic acids. (Image ...

They also have a "superpower" in the field: they are able to fix nitrogen ... of purine nucleotides, such as adenine, in this crop. Adenine is one of the 5 nitrogenous bases always present in ...

The de novo synthesis of purine and pyrimidine nucleotides occurs through separate ... These modifications can involve changes in the nitrogenous base, sugar molecule, or phosphate group. Nucleotide ...