Question

One example for aliphatic biogenic amine is .......

• A. Putrescine
• B. Tyramine
• C. Histidine
• D. Tryptamine

Hint:

Aliphatic biogenic amines like Putrescine (\( C_4 \)) and Cadaverine (\( C_5 \)) are straight-chain diamines responsible for the characteristic odor of spoiling flesh.
Aromatic biogenic amines, such as Tyramine and Tryptamine, contain ring structures derived from aromatic amino acids.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Biogenic amines are low-molecular-weight organic bases that are formed primarily by the microbial decarboxylation of free amino acids.
These compounds serve as important chemical indicators of food spoilage and decomposition, particularly in protein-rich foods like meat, fish, and cheese.

Step 2: Detailed Explation:
Biogenic amines can be structurally classified as aliphatic, aromatic, or heterocyclic.
1. Aliphatic amines contain straight or branched hydrocarbon chains without aromatic ring structures.
Putrescine is a diamine with the chemical formula \( \text{NH}_2(\text{CH}_2)_4\text{NH}_2 \).
It is formed by the decarboxylation of the amino acid ornithine (or from arginine via agmatine) during bacterial putrefaction.
Because its carbon chain is a straight, open hydrocarbon chain, putrescine is classified as an aliphatic biogenic amine.
2. Tyramine is an aromatic biogenic amine formed from tyrosine, and it contains a phenolic ring.
3. Tryptamine is an aromatic heterocyclic amine formed from tryptophan, and it contains an indole ring system.
4. Histidine is an amino acid (not a biogenic amine itself, though its decarboxylated product histamine contains an imidazole ring).

Step 3: Fil Answer
The correct option is Putrescine, which is a classic aliphatic biogenic amine.