In Conventional Peptide Synthesis,the Nitrogen of a Given Amino Acid

question 34

Multiple Choice

In conventional peptide synthesis,the nitrogen of a given amino acid must be deactivated or blocked while the carboxyl group is activated.Which of the following reagents is used to protect the amino group of an amino acid?

• A)di-tert-butyl dicarbonate
• B)dicyclohexylcarbodiimide
• C)ninhydrin
• D)trifluoroacetic acid
• E)phenylisothiocyanate

---

Definitions:

Clockface

The dial of a clock that displays the time through fixed-numbered dials or moving hands, not typically related to film or media studies.

Skyscraper

A very tall, continuously habitable building of many floors, usually designed for office, commercial, and residential use.

German Expressionist

Pertaining to an early 20th-century movement in art, theatre, and cinema originating in Germany, characterized by its use of symbolic, often abstract visual styles to explore psychological and emotional states.

Sunrise

A silent film directed by F.W. Murnau in 1927, known for its innovative visual style and considered a masterpiece of cinematic art.