Chapter 29: 16P (page 1166)
How many different tripeptides can be formed from three different amino acids?
Short Answer
Two different tripeptides can be formed from three different amino acids.
/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none}
Learning Materials
Features
Discover
Chapter 29: 16P (page 1166)
How many different tripeptides can be formed from three different amino acids?
Two different tripeptides can be formed from three different amino acids.
All the tools & learning materials you need for study success - in one app.
Get started for free
Which of the following amines can be used to resolve a racemic mixture of amino acids?
(a)

(b)

(c)

(d)

What types of stabilizing interactions exist between each of the following pairs of amino acids?
a. Ser and Tyr
b. Val and Leu
c. two Phe residues
An octapeptide contains the following amino acids: Arg, Glu, His, Ile, Leu, Phe, Tyr, and Val. Carboxypeptidase treatment of the octapeptide forms Phe and a heptapeptide. Treatment of the octapeptide with chymotrypsin forms two tetrapeptides, A and B. Treatment of A with trypsin yields two dipeptides, C and D. Edman degradation cleaves the following amino acids from each peptide: Glu (octapeptide), Glu (A), Ile (B), Glue (C), and Val (D). Partial hydrolysis of tetrapeptide B forms Ile-Leu in addition to other products. Deduce the structure of the octapeptide and fragments A-D.
Draw the structure of leu-enkephalin, a pentapeptide that acts as an analgesic and opiate, and has the following sequence: Tyr–Gly–Gly–Phe–Leu. (The structure of a related peptide, met-enkephalin,
appeared in Section 22.6B.)
Draw the organic products formed in the following reaction.

What do you think about this solution?
We value your feedback to improve our textbook solutions.