Franklin personally told Crick and Watson that the backbones had to be on the outside Linus Pauling and Watson and Crick had generated erroneous models with the chains inside and the bases pointing outwards .
The outside was a crucial piece of information ; before then .
Franklin personally told Crick and Watson that the backbones had to be on the outside , which was a crucial piece of information ; before then , Linus Pauling and Watson and Crick had generated erroneous models with the chains inside and the bases pointing outwards .