Word: stranded
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Dates: during 1960-1969
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...House on the Strand, du Maurier...
...House on the Strand, du Maurier...
...Nature. Once the two strains of virus had finished raiding the bacteria, the experimenters dissolved their protein sheaths, exposing their raw DNA molecules (Step 1 in diagram). Next, the scientists heated the dissimilar DNA molecules, causing each double helix to unwind and separate into one lighter and one heavier strand. Taking only the heavier strand from each virus, the researchers placed them in the same test tube, reheated them and then cooled them slowly, a process that causes two chemically complementary strands of DNA to combine in a double helix. But the two strands were complementary only along the segments...
...lactose gene segments of DNA were chemically complementary and combined easily into a double strand...
They then combined a single piece of DNA from one virus with another strand from the other virus type...