Modified cloning vectors for restriction mapping, their preparation and use
First Claim
1. A modified cloning vector for facilitating mapping of a DNA molecule present in said modified cloning vector, said vector having a multiple cloning site including said DNA molecule and a DNA construct, said construct being a linear, synthetic oligonucleotide consisting essentially of an infrequent cutter segment providing a recognition sequence for a site-specific restriction enzyme, said recognition sequence being at lest eight base pairs in length, and a discrete, hybridizable linker segment, said construct being positioned in said vector with said linker segment adjacent to said DNA molecule.
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Abstract
Modified cloning vectors having general utility for easily obtaining unambiguous restriction maps of recombinant DNA molecules and the methods of preparation and use of such vectors.
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Citations
13 Claims
- 1. A modified cloning vector for facilitating mapping of a DNA molecule present in said modified cloning vector, said vector having a multiple cloning site including said DNA molecule and a DNA construct, said construct being a linear, synthetic oligonucleotide consisting essentially of an infrequent cutter segment providing a recognition sequence for a site-specific restriction enzyme, said recognition sequence being at lest eight base pairs in length, and a discrete, hybridizable linker segment, said construct being positioned in said vector with said linker segment adjacent to said DNA molecule.
- 10. A method of preparing a modified cloning vector useful for obtaining a restriction map of a DNA molecule present in said vector, said method comprising inserting into a cloning vector a DNA construct, said construct being a linear, synthetic oligonucleotide consisting essentially of an infrequent cutter segment providing a recognition sequence for a site-specific restriction enzyme, said restriction sequence being at least eight base pairs in length, and a discrete, hybridizable linker segment, said construct being positioned in said vector with said linker segment adjacent to said DNA molecule and wherein said vector comprises a multiple cloning site including said DNA molecule and said DNA construct is positioned adjacent to said multiple cloning site.
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13. A DNA construct for facilitating restriction mapping of a DNA molecule, said construct being a linear, synthetic oligonucleotide consisting essentially of an infrequent cutter segment providing a recognition sequence for a sitespecific restriction enzyme, said recognition sequence being at least eight base pairs in length, and a discrete, hybridizable linker segment, said construct being adapted for insertion into a vector to provide a modified vector, each terminus of said linear oligonucleotide comprising a recognition sequence for a sitespecific restriction enzyme, whereby said construct is insertable into said vector, said linker segment being positioned intermediate said frequency cutter segment and said DNA molecule to be mapped and wherein the recognition sequence of each terminus is the same.
Specification