It was n't until NUMBER@1 that PERSON@1 's `` transforming principle '' was identified as DNA by PERSON@2 , along with coworkers PERSON@3 and PERSON@4 .

Years later PERSON@1 's `` transforming principle '' was identified as DNA by PERSON@2 , along with coworkers PERSON@3 and PERSON@4 , in NUMBER@1 .
