A-DNA B-DNA Z-DNA A-Deoxyribose nucleic acid: A-Deoxyribose nucleic acid. is a right-handed double helix comparable to the B-DNA form. Dehydrated Deoxyribose nucleic acid takes an A structure that saves that Deoxyribose nucleic acid during the immoderate condition. Protein joining also vanishes to solvent from DNA and the Deoxyribose nucleic acid takes an A-structure. It has 11 helical turns. Major Grooves are present in A-form.   B-Deoxyribose nucleic acid: It is the most frequent Deoxyribose nucleic acid form. It is also a right-handed structure. A large number of Deoxyribose nucleic acid has a B-type confirmation under normal conditions. It has major grooves. It contains 10 helical turns.   Z-Deoxyribose nucleic acid: It is a left-handed Deoxyribose nucleic acid helix. It is of a Zigzag pattern. Andres Wang and Alexander rich discovered Z-Deoxyribose nucleic acid. It contains 12 helical turns.