Summary
We have developed a new fluorescence-based method for DNA fingerprinting that does not require a fluorescent linker or a synthetic oligonucleotide primer, both of which are normally used for labeling of DNA. Cosmid DNAs are digested with appropriate restriction enzymes and the 3′ termini of DNA fragments are labeled with the corresponding, fluorescent dye-conjugated dideoxynucleotide triphosphate terminator (dye-ddNTP) by the Klenow fragment of DNA polymerase I fromEscherichia coli, which has 3′→5′ exonuclease and replacement activities as well as its main 5′→3′ polymerase activity. Samples are separated on a DNA-sequencing gel and data are analyzed by application of both the Version 0.3.8a mapper program (Applied Biosystem Inc., Foster City, CA) and our Overlap I program that facilitate rapid analysis of the frequency of overlapping of cosmid DNAs. Using this method we have determined the overlap frequency of DNA fragments of each cosmid clone from the mouse MHC class I gene cluster.
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Tang, X., Wang, Y., Li, HO. et al. DNA fingerprinting involving fluorescence-labeled termini of any enzymatically generated fragments of DNA. Jap J Human Genet 39, 379–391 (1994). https://doi.org/10.1007/BF01892383
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DOI: https://doi.org/10.1007/BF01892383