Rosalind Franklin was a forerunner in the preliminary research towards determining the structure of DNA. Her X-ray crystallography photos and corresponding mathematical data led to the discovery of the helical structure of DNA.
These results set out the basis for many further studies, including the well-known discoveries by Watson and Crick. Controversy over Franklin’s contributions to Watson and Crick’s work has been the subject of debate continuing to this day.
During her lifetime her results were not fully accepted, the Nobel Prizes was awarded years after her death to Watson and Crick, neither giving any credit to Franklin’s work.