adenine molecule 3d, molecular structure, ball and stick model, structural chemical formula nucleic acids

adenine purine nucleobase nucleobases nucleic acids molecule molecular structure chemical formula model c5h5n5 atom chemistry rna laboratory science nucleotide acid biology dna information research base illustration deoxyribonucleic footed code composition gene medical medicine test biochemistry complementary genome organism pair skeletal compound element vitamin icon line ball stick structural acids