The labeled nucleotides were incorporated into growing DNA molecules only during ... The study of DNA replication started almost as soon as the structure of DNA was elucidated, and it continues ...

Watson and Crick's discovery of DNA structure in 1953 revealed a possible mechanism for DNA replication. So why didn't Meselson and Stahl finally explain this mechanism until 1958 ...

"Until now, we lacked a way to specifically label euchromatin and heterochromatin ... important processes like gene expression and DNA replication. "These differences in chromatin behavior are ...