Tuftsin Is a Peptide That Stimulates and Promotes the Destruction

question 29

Multiple Choice

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.

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