Foto de stock - A scientist places a DNA gel envelope on a test pad. They are preparing for the southern blot technique, now used in recombinant DNA technology. These new technologies have revolutionized the way scientists can look at the detail of cellular molecules. Photo by Linda Bartlett.

Imagen: A scientist places a DNA gel envelope on a test pad. They are preparing for the southern blot technique, now used in recombinant DNA technology.

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