Chapter 22: Problem 89

Write the sequence of all possible tetrapeptides composed of the following amino acids. a. two phenylalanines and two glycines b. two phenylalanines, glycine, and alanine

Short Answer

Expert verified

a. Possible tetrapeptides with two phenylalanines and two glycines: 1. FFGG 2. FGFG 3. FGGF 4. GFFG 5. GFGF 6. GGFF b. Possible tetrapeptides with two phenylalanines, one glycine, and one alanine: 1. FFGA 2. FGAf 3. FAGF 4. FGAF 5. FAfg 6. GFAF 7. GAFF 8. GfAF 9. AGFF 10. AFGF 11. AGfF 12. GgAF

Step by step solution

Identify the amino acids

We are given two phenylalanines (F) and two glycines (G) to form tetrapeptides.

Calculate the number of possible arrangements

Since we have two each of phenylalanines and glycines, there are 4!/(2!2!) possible arrangements.

List all possible arrangements

Now we will list all the possible tetrapeptides: 1. FFGG 2. FGFG 3. FGGF 4. GFFG 5. GFGF 6. GGFF b. Two phenylalanines, one glycine, and one alanine

Identify the amino acids

We are given two phenylalanines (F), one glycine (G), and one alanine (A) to form tetrapeptides.

Calculate the number of possible arrangements

Since we have two phenylalanines, one glycine, and one alanine, there are 4!/(2!) possible arrangements.

List all possible arrangements

Now we will list all the possible tetrapeptides: 1. FFGA 2. FGFa 3. FAGF 4. FGAF 5. FAfg 6. GFAF 7. GAFF 8. GFaf 9. AGFF 10. AFGF 11. AGfF 12. GgAF

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Write the sequence of all possible tetrapeptides composed of the following amino acids. a. two phenylalanines and two glycines b. two phenylalanines, glycine, and alanine

Short Answer

Step by step solution

Identify the amino acids

Calculate the number of possible arrangements

List all possible arrangements

Identify the amino acids

Calculate the number of possible arrangements

List all possible arrangements

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