Page 51 - Cell biology PDG 2024
P. 51
The ribosome continues the process of translation until it encounters a
termination codon on the mRNA. When this happens, the growing protein
called a polypeptide chain is released from the tRNA and the ribosome
splits back into large and small subunits
The newly formed polypeptide chain undergoes post translational
modifications before becoming a fully functioning protein
Post translational modification (PTMs)
They are chemical modifications to the newly formed polypeptide chain.
These chemical alterations give the proteins their different structures and
functions
Types of post translation modification
Protein Structure
• Primary (1°) Protein Structure
• Secondary (2°) Protein Structure
• Tertiary (3°) Protein Structure
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