Search Results for: mutations

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2,429 results

2,429 results for: mutations

  1. Health & Medicine

    Honey of a Threat

    An all-natural, organic food, honey has a benign–if not wholesome–image. Many people consider it a superior alternative to table sugar and corn syrup–two primary sweeteners in the U.S diet. Though attractive to bees, borage may lace its flowers nectar with toxic chemicals that could then show up in honey. James N. Roitman, USDA-ARS Comfrey, formerly […]

    By Janet Raloff
  2. Health & Medicine

    Have a heart: Turn on just a single gene

    One gene appears to act as the master switch in embryonic heart formation.

    By Jessa Netting
  3. Health & Medicine

    Blood vessels (sans blood) shape organs

    Even before they begin to carry blood, blood vessels provide signals that help spark the development of organs such as the liver.

    By John Travis
  4. Health & Medicine

    Radiation harms blood vessels before gut

    The side-effects of radiation therapy may result from initial damage to blood vessels.

    By John Travis

  5. Gene found for chloroplast movement

    Scientists have found the gene that directs chloroplasts to dance out of a cell's shaded edges to soak up the sun or back into that shade when the light is too intense.

    By Jessa Netting
  6. Health & Medicine

    Immunity’s Eyes

    Proteins called toll-like receptors allow human immune cells to detect microbes.

    By John Travis

  7. DNA-cutting enzyme looks like scissors

    One type of restriction enzyme not only cuts a DNA strand but also looks like a pair of scissors.

    By Jessa Netting
  8. Health & Medicine

    Berry Colorful Nutrition News (with recipes)

    Ah, raspberries. So sweet, so delicate on the tongue, so ephemeral. Oregon Raspberry and Blackberry Commission Isolated pigments from the four raspberries tested. Liu/Cornell Oregon Raspberry and Blackberry Commission Every year, I unsuccessfully defend my raspberries against squirrels, birds, and beetles. As I watch the fruit begin to ripen, so do the neighborhood creatures. Two […]

    By Janet Raloff

  9. Genetic search for an equine Eve fails

    Genetic analysis suggests an unusual history for modern horses: lots of independent domestications instead of the usual few.

    By Susan Milius

  10. A More Perfect Union

    Forsaking life in the outside world, endosymbiotic bacteria of some insects traded freedom and nutrients for life inside a cell.

    By Jessa Netting
  11. Health & Medicine

    Genetically altered cells ease hemophilia

    A gene therapy using skin cells that are genetically modified to make clotting proteins, multiplied in a lab, and reinjected into a person eases some bleeding in patients with severe hemophilia.

    By Nathan Seppa

  12. Dolly Was Lucky

    Scientists studying the data on animal cloning argue that cloning a person would be unsafe.

    By John Travis