rna double helix造句

• In the case of RNA transcription, the DNA strands are parted and one is replicated by forming a temporary DNA-RNA double helix structure.
• The hydroxyl group also forces the ribose into the C3'- " endo " sugar conformation unlike the C2'- " endo " conformation of the deoxyribose sugar in DNA . This forces an RNA double helix to change from a B-DNA structure to one more closely resembling A-DNA.
• NMR studies of the Z-RNA double helix at high salt concentrations show Z-RNA to resemble, but not be identical, to that of Z-DNA . The structure of the complex of a Zalpha domain with Z-RNA under close to physiological salt concentrations however suggests a structure much closer to the Z-DNA conformation and points to two forms of Z-RNA ( low and high salt conformations)