Open Question
What amino acids do the following abbreviations stand for? (a) Ser (b) Thr (c) Pro (d) Phe (e) Cys
Ch.23 - Organic and Biological Chemistry
Chapter 23, Problem 119
How many tetrapeptides containing alanine, serine, leucine, and glutamic acid can you form? Use the three-letter abbreviations to name three.
Verified step by step guidance1
Step 1: Understand that a tetrapeptide is a peptide consisting of four amino acids linked by peptide bonds.
Step 2: Identify the four amino acids given: alanine (Ala), serine (Ser), leucine (Leu), and glutamic acid (Glu).
Step 3: Recognize that the number of different tetrapeptides that can be formed is determined by the number of permutations of the four amino acids.
Step 4: Calculate the number of permutations of four distinct items, which is given by 4! (4 factorial).
Step 5: Use the three-letter abbreviations to name three possible tetrapeptides, such as Ala-Ser-Leu-Glu, Ser-Leu-Glu-Ala, and Leu-Glu-Ala-Ser.
Related Practice
Open Question
Name and draw the structures of amino acids that fit the following descriptions. (a) Contains an isopropyl group (b) Contains an alcohol group (c) Contains a thiol group (d) Contains an aromatic ring
Open Question
Use the three-letter abbreviations to name all tripeptides containing methionine, isoleucine, and lysine.
Open Question
What is a nucleotide, and what three kinds of components does it contain?
Open Question
What are the names of the sugars in DNA and RNA, and how do they differ?
Open Question
Show by drawing structures how the phosphate and sugar components of a nucleic acid are joined.