PROF. OSCAR L. MILLER / SCIENCE PHOTO LIBRARY PROF. OSCAR L. MILLER / SCIENCE PHOTO LIBRARY
Visualisation of a gene involved in protein synthesis: transmission electron micrograph (TEM) of a structural gene operon from the bacterium Eschericia coli, showing the coupled transcription of DNA into messenger RNA (mRNA) molecules and the translation of this messenger code into protein molecules. This translation of mRNA is protein synthesis, and takes place on the dense granular ribosomes (dark circles) that appear in this image. Magnification: x160,000 at 8x10-inch size.
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