Combine these amino acids into a tripeptide. add or remove atoms and bonds as needed.

Combine these amino acids into a tripeptide. Add or remove atoms
and bonds as needed. You can see I have changed a few things, I
just can not seem to get it.

General guidance

Concepts and reason
Tripeptide is formed by combining three amino acids via peptide bonds by using the concept of valence of elements, removal or addition bonds can be done to get tripeptide structure.

Fundamentals

Amino acids are organic compounds which contain functional groups such as (amine), (carboxyl) with (alkyl) groups present in theside chain.
General form of a tripeptide is;
AA-AA-AA
Note: when two amino acids combine peptide bond is formed.

Step-by-step

Step 1 of 3

Write valency of each atom present in the tripeptide

Valency of each atom is tabulated according to its electronic configuration.
Carbon:
So, valency of carbon is
Likewise;
Nitrogen:
Oxygen:
Hydrogen:

Take care while filling valency for atoms.
Example:Thevalency of nitrogen is 5, not 3.

Look for the number of bonds present in

Step 2 of 3

Atoms which don’t satisfy valency are circled in red.

From the valency of elements and structure in the question, we can observe that nitrogen should have avalency of 3(maximum of three bonds). Other elements in structures like C, O, and H has stable valency respectively. In the given structure, Nitrogen (circled in red) has 4 bonds surrounding it, making it positively charged.

Take care while counting a number of bonds present in each atom.
Example: Number of bonds in N is 3, not 4
[Hint for next step]:
Removal of bonds to make nitrogen (N) neutral

Step 3 of 3

When one bond is removed from nitrogen (was circled in red fig 1), it gets satisfied with 3 neighbouring bonds.

Structure of tripeptide will be

Removal of bonds in Nitrogen (circled in red) will make nitrogen to have avalency of 3, nitrogen surrounding with three bonds.Removal of a single bond in nitrogen makes it have complete tripeptide structure.

Answer

Structure of tripeptide will be

Answer only

Structure of tripeptide will be

(CONH).
HN-
-COOH
C=ONH
C, N, O, and H
Element Valency C N
1s²2s²2p
1s 2s 2p?
1s²2s²2p
C, N, Oand H
но но с-о-н тът -c -o —н —I Hс сн, Figure 1
C- 0-H Z – C- H I- CH2 CH – H₃C CH₂
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