LAGUNA DESIGN / SCIENCE PHOTO LIBRARY LAGUNA DESIGN / SCIENCE PHOTO LIBRARY
Excisionase complexed with DNA (deoxyribonucleic acid). Computer model showing the structure of the bacteriophage protein excisionase (yellow) complexed with DNA: first strand, 5'-end (magenta), first strand, 3'-end (green), second strand (blue). From Escherichia virus lambda.
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