2,458 results
2,458 results for: mutations
- Earth
Filtered air cuts down mutations
Microscopic particles in the air may mutate the DNA of sperm.
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Bubble Trouble: Mad cow proteins may hitch a ride between cells
Prions, the proteins behind mad cow disease, may travel between cells in bubbles called exosomes.
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Mr. Universe Jr.: Child’s gene mutation confirms protein’s role in human-muscle growth
A boy born with extra-large muscles has mutations in a gene regulating muscle growth.
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Two-handed protein may protect DNA
An unusually shaped protein may help a bacterium thrive in tough times.
- Archaeology
Rat DNA points to Pacific migrations
An analysis of mitochondrial DNA from Pacific rats supports a theory that ancestors of today's Polynesians migrated from Southeast Asia to a string of South Pacific islands in at least two separate dispersals.
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Clearing Up Blurry Vision: Scientists gaze toward causes of myopia
Scientists are beginning to unravel the genetic mechanism that causes nearsightedness.
- Paleontology
Chipmunks in Wisconsin toughed out ice age
Analyses of DNA from chipmunks in parts of the U.S. Midwest hint that some populations of the creatures stayed in northern refuges rather than migrating south at the beginning of the last ice age.
- Health & Medicine
Gene stifled in some lung, breast cancers
The silencing of a gene called RASSF1A appears to increase the risk of cancer, studies of lung and breast tumors show.
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Anticancer Protein Locks onto DNA
The protein encoded by the normal form of BRCA1 attaches to DNA directly, seeks out unusual DNA structures, and joins multiple DNA strands together—all activities suggesting a direct role in DNA repair.
- Health & Medicine
New drug takes on intestinal cancer
Imatinib mesylate, already approved by the FDA for treating people with a form of leukemia, blocks the activity of certain enzymes that cause gastrointestinal stromal cells to replicate uncontrollably.
- Health & Medicine
Genetic flaw found in painful gut disease
Scientists have discovered a genetic mutation that occurs in people with Crohn's disease, a digestive disorder that attacks the intestines.
- Health & Medicine
Heart disease linked to clotting gene
African Americans with a mutation in a blood-clotting gene have a sixfold increase in the risk of heart disease, but this is not the case for white Americans with the same mutation.
