Tuftsin Is a Peptide That Stimulates and Promotes the Destruction

Tuftsin is a peptide that stimulates and promotes the destruction of tumor cells.Its primary structure is shown below.Which of the following is NOT a valid interpretation of its primary structure? Thr-Lys-Pro-Arg

A) It is a tetrapeptide.
B) It contains three peptide bonds.
C) Threonine is the N-terminal amino acid and arginine is the C-terminal amino acid.
D) The carboxyl group of lysine is joined to the amino group of proline.
E) The amino group of arginine is not joined to any other amino acid.

Correct Answer:

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