Cloning Vectors
Cosmids lack

origin of replication
marker genes coding for replication
cleavage site for the insertion of foreign DNA
genes coding for viral proteins

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Cloning Vectors
Charon vectors are different from EMBL vectors because

they have more extensive range of restriction targets with in their polylinkers.
both (a) and (b)
physical separation of lambda arm from central fragment is required
physical separation of lambda arm from central fragment is not required

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