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Cleavage map of bacteriophage T4 cytosine-containing DNA by sequence-specific endonucleases SalI and KpnI
Abstract:
Cytosine-containing T4 DNA from endoII- endoIV- dCTPase- alc2 phage grown in a sup+ rB- mB- host is cleaved by endo R.EcoRI and endo R.HindIII to greater than 40 fragments and by endo R.SalI and endo R.KpnI to 8 and 6 fragments, respectively. The latter two fragment sets have been correlated to each other to produce a cleavage map of the genome. The sum of the molecular weights of the fragments calculated from electrophoretic mobility in agarose gels yields a genome molecular weight for cytosine-containing T4 DNA of 105 x 10(6).
Insights
This study maps the genome of cytosine-containing T4 phage DNA. Restriction enzyme analysis determined the T4 DNA genome molecular weight to be 105 x 10(6).
Area of Science:
- Molecular Biology
- Genomics
- Virology
Background:
- T4 phage is a well-studied model organism in molecular biology.
- Understanding the T4 DNA genome structure is crucial for various genetic studies.
Purpose of the Study:
- To construct a cleavage map of the cytosine-containing T4 DNA genome.
- To determine the molecular weight of the T4 DNA genome.
Main Methods:
- Digestion of cytosine-containing T4 DNA with restriction enzymes (EcoRI, HindIII, SalI, KpnI).
- Analysis of DNA fragments using agarose gel electrophoresis.
- Correlation of fragment sets to generate a genome map.
Main Results:
- EcoRI and HindIII produced over 40 fragments.
- SalI and KpnI generated 8 and 6 fragments, respectively.
- The T4 DNA genome molecular weight was calculated to be 105 x 10(6).
Conclusions:
- A cleavage map of the cytosine-containing T4 DNA genome was successfully generated.
- The molecular weight of the T4 DNA genome was precisely determined using restriction fragment analysis.