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Which of the following is commonly used as a vector for introducing a DNA fragment in human lymphocytes?
A
$\lambda$ phage
B
Ti plasmid
C
Retrovirus
D
pBR 322
Explanation
Retroviral vectors are used in gene therapy (e.g. ADA deficiency).
Detailed Solution
Retrovirus is commonly used as a vector for introducing a DNA fragment in human lymphocytes.
Gene therapy: lymphocytes from the blood of the patient are grown in culture outside the body, and a functional gene is introduced into these lymphocytes using a retroviral vector.