With the DNA pinned in place, it is straightforward to trace the motion of fluorescently-labelled proteins under a microscope and view their activity ... it can zip up two aligning strands ...

To test the two hypotheses, researchers from the ... the researchers conclude that both theories linking DNA ancestry tests ...

As early as 1943 Oswald Avery proved what had been suspected: that DNA, a nucleic acid, carries genetic information. But no one knew how it worked. By the early 1950s, at least two groups were hot ...