Assertion: double helix | /r/HasProperty | see
Facets:
Source sentences:
text: The logical way to do this was by the study of X-ray diffraction patterns, but the patterns obtained, while sufficient to be useful in working out the structure of small molecules such as vitamin B-12 or simple chains such as the DNA double helix (see 1953), were not helpful in working out the intricacies of the protein molecule.