What is the N and C terminal?

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Solution

Terminals of polypeptides
Polypeptides are made of more than one amino acid, which is linked together through peptide bonds.
The N-terminal of the polypeptide is the start of the chain, which consists of a free amine group.
The N-terminal comprises signal peptide sequences that direct the protein to its target organelle.
The C-terminal of the polypeptide is the end of the chain, which consists of a free carboxyl group.
The C-terminal comprises a retention signal that prevents the polypeptide from entering the wrong pathway.

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