Cloning Vectors
Phagemid vectors are

All of these
phages carrying properties of plasmids
combination of phages and cosmid
combination of plasmid and phage λ

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Cloning Vectors
Phagemid consist of

plasmid vector carrying λ attachment (λ att) site
plasmid vector carrying origin of replication of λ phage only
plasmid vector carrying λ phage's cos site
plasmid vector carrying origin of replication of plasmid only

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Cloning Vectors
Conjugative plasmids

carry transfer genes called the tra genes
do not carry transfer genes
do not exhibit antibiotic resistance
exhibit antibiotic resistance

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Cloning Vectors
Cosmids lack

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

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