These resulted in significant contributions to our understanding of the solution conditions that determine polypeptide conformation and to the development of techniques, particularly optical rotatory dispersion, for determining the - helical and β - sheet contents of various key proteins (4)(most notably myoglobin, the helical content of which was confirmed by John Kendrew's X-ray structure analysis) as well as
the helical nature of the three - stranded protein collagen.
Photograph 51, named for Franklin's famous x-ray image that revealed
the helical nature of DNA, tells the story of her rocky relationship with the other personalities in the race to uncover the molecule's structure.