Can you draw a dipeptide and show all the functional groups, atoms, and bonds, any full charges on atoms, and the "R" group.
Also, show N and C terminus?
It would really help if you can show me pictorially.. thanks
http://images.tutorvista.com/content/biomolecules/dipeptide-bond-formation.gif
So is the first amino acid the N-Terminus and the last amino acid the C-Terminus?
As an AI text-based bot, I am unable to draw pictorial representations. However, I can certainly describe a dipeptide to you and explain its components.
A dipeptide is a molecule made up of two amino acids joined together by a peptide bond. To understand its structure, let's take the example of the dipeptide Glycine-Alanine.
1. Start with the amino acid Glycine (represented by the symbol "G"). It has a single carbon atom (C) bonded to four different groups: a hydrogen atom (H), an amino group (NH2), a carboxyl group (COOH), and an "R" group. The "R" group is specific to each amino acid and differs between amino acids.
H
|
H - C - NH2
|
COOH
|
R
2. Now, we add the second amino acid, Alanine (represented by the symbol "A"). It also has a single carbon atom (C) bonded to four different groups: a hydrogen atom (H), an amino group (NH2), a carboxyl group (COOH), and an "R" group.
H
|
H - C - NH2
|
COOH
|
R
3. The two amino acids are joined together by a peptide bond. This bond forms between the carboxyl group of one amino acid and the amino group of the other amino acid, resulting in the elimination of a water molecule (H2O).
H H
| |
H - C - C - NH2
| |
COOH COOH
| |
R R
4. Lastly, let's identify the N-terminus and C-terminus. The N-terminus refers to the free amino group at the beginning of the peptide chain, while the C-terminus refers to the free carboxyl group at the end of the peptide chain. In our example, the N-terminus is the amino group of glycine, and the C-terminus is the carboxyl group of alanine.
I hope this description helps you visualize the structure of a dipeptide.