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Anup Padwal
All the three can be used as vector, because all have same restriction site for both restriction enzyme.
please explain.... answer is given vector3
if appropriate anser is asked then you can give 3, because it contain less GC than other 2.
can u explain more
yes, see the sequence of bases of vector all contains the cut site for both the restriction enzyme. Also all have sufficient space of base pair atter promoter region. so all vector can use to insert ORF of gene of interest. but if you have to select only one option search for ST rich region after promoter which results in easy sepetration of base pair.