Hirudin is

Options

A. a protein produced by Hordeum vulgare, which is rich in lysine
B. a toxic molecule isolated from Gossypium hirsutum, which reduces humn fertility
C. a protein produced from transgenic Brassica napus which prevents blood clotting
D. an antibiotic produced by a genetically engineered bacterium Escherichia coli

Answer

C

Explanation

Hirudin is a protein that stops blood clotting. The gene encoding hirudin was chemically synthesised. This gene was then transsferred into Brassica napus, where hirudin accumulates in seeds. The hirudin is purified and used as medicine.