The difference between Adenine and Purine
When used as nouns, adenine means a base, c_5h_5n_5, found in certain glands and tissues, which pairs with thymine in dna and uracil in rna, whereas purine means any of a class of organic heterocyclic compounds, composed of fused pyrimidine and imidazole rings, that constitute one of the two groups of organic nitrogenous bases (the other being the pyrimidines) and are components of nucleic acids.
check bellow for the other definitions of Adenine and Purine
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Adenine as a noun (biochemistry, genetics):
A base, C_5H_5N_5, found in certain glands and tissues, which pairs with thymine in DNA and uracil in RNA.
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Purine as a noun (organic compound):
Any of a class of organic heterocyclic compounds, composed of fused pyrimidine and imidazole rings, that constitute one of the two groups of organic nitrogenous bases (the other being the pyrimidines) and are components of nucleic acids.