The anticoagulant hirudin is obtained from :

Options

A. Milk of sheep
B. bolls of cotton plant
C. seeds of Brassica napus
D. Salmonella typhimurium

Answer

To determine the source of the anticoagulant hirudin, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Hirudin**: Hirudin is a protein that acts as an anticoagulant, meaning it helps prevent blood clotting.

2. **Identifying Natural Sources**: Hirudin is naturally produced by leeches, specifically in their saliva. This is an important point to note as it indicates the biological origin of the protein.

3. **Recombinant Technology**: Scientists have been able to isolate the gene that encodes for hirudin from leeches. This gene can then be inserted into other organisms for production purposes.

4. **Host Organism for Production**: One of the organisms that has been used to produce recombinant hirudin is *Brassica napus*, commonly known as rapeseed. The gene for hirudin is incorporated into the seeds of this plant.

5. **Isolation of Hirudin**: After the seeds of *Brassica napus* are genetically modified to produce hirudin, the protein can be extracted from these seeds for use as an anticoagulant.

6. **Conclusion**: Therefore, the correct answer to the question "The anticoagulant hirudin is obtained from:" is the seeds of *Brassica napus*.

### Final Answer:
The anticoagulant hirudin is obtained from the seeds of *Brassica napus*.

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