Cell biology: How ribosomes override their blockades

Ribosomes are “protein factories” in the cells of all living things. They produce proteins based on existing genetic codes stored on special nucleic acid molecules. These molecules, also called messenger RNA (mRNA) due to the genetic information encoded on them, are read by ribosomes in a stepwise manner. Defined start and stop signals on the mRNA direct this process. If a stop signal is missing, protein formation cannot be completed and the ribosome’s mode of operation is blocked.

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