Mapping to the point
Article Abstract:
A characteristic unique to patients of Bloom's syndrome (BS) led researchers to develop a model for intragenic somatic recombination, which identified the gene responsible for the disease. Using the technique, researcher discovered that fusion of lymphocytes with high sister-chromatid exchanges (SCE) with low-SCE cells restores normal phenotype as fusion to a normal cells does. They later developed markers to see if intragenic recombination is occurring, which will show if a change in homozygosity is taking place. The basic concepts of this procedure has led now to more successful gene mapping techniques.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
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Lights turning red on amber
Article Abstract:
The subject of fossil DNA has a fascination for many people, particularly the theory that DNA could survive for millions of years if protected by amber. However, a paper refutes the stories about amber after experiments on insects that were trapped in Oligocene Dominican amber. No traces of credibly ancient DNA were found, casting doubt on original studies that reported success in 13 out of 14 cases. Interest has been aroused in the revival of dead DNA after the retrieval of DNA from a Cretaceous dinosaur fossil, and a 20 million year old magnolia leaf that produced sequences similar to modern magnolias.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
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Dynamo model at a turning point
Article Abstract:
The dynamo model suggested by G.A. Glatzmaier and P.H. Roberts will be useful for testing mean field hypotheses numerically in the field of geophysics. The proposed model has a dipole/non-dipole ratio weaker that of Earth and has a faster field reversal rate, allowing for the testing of angular momentum transfers between mantle and crust in less than geological timescales.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
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