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Unformatted text preview: Ribonucleases destroy the mRNA. Prolactin is a hormone that prevents destruction of the mRNA. Translational Control These mechanisms prevent the synthesis of protein. They often involve protein factors needed for translation. Preventing Ribosomes From Attaching Proteins that bind to specific sequences in the mRNA and prevent ribosomes from attaching can prevent translation of certain mRNA molecules. Initiation Factors Initiation factors are proteins that enable ribosomes to attach to mRNA. These factors can be produced when certain proteins are needed. For example, the eggs of many organisms contain mRNA that is not needed until after fertilization. At this time, an initiation factor is activated...
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