Question

There are a total of six different amino acid sequences for a tripeptide containing one molecule each of alanine, leucine, and glutamic acid. Using three letter abbreviations for the amino acids, draw the six possible sequences of amino acids.

Answer 1

Tree letter abbreviations for three listed aminoacids are:
Alanine - Ala
Leucine - Leu
Glutamic acid - Glu.
Possible sequences of aminoacids are (from N- to C-term):
1. Ala-Leu-Glu
2. Ala-Glu-Leu
3. Glu-Ala-Leu
4. Glu-Leu-Ala
5. Leu-Glu-Ala
6. Leu-Ala-Glu