 |
STEP III IN PROTEIN SYNTHESIS:
TERMINATION
The elongation procedure continues until the proper protein is completed. A "stop" codon (U-A-A, U-G-A, or U-A-G) signals the end of the process. there is no tRNA that is complementary to the Stop Codon, so the process of building the protein stops. An enzyme called the releasing factor then frees the newly made polypeptide chain, also known as the PROTEIN, from the last tRNA. The mRNA molecule is released from the ribosome as the small and large subunits fall apart. The mRNA can then be re-translated or it may be degraded, depending on how much of that particular protein is needed. All mRNA messages are eventually degraded when the protein no longer needs to be made.
CLICK HERE TO SEE ANIMATION OF THE PROCESS OF TRANSLATION!
Try Practice Problem #3!
|
 |
