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First finding of a metabolite in 1 sex only

Researchers at the University of Illinois at Chicago have discovered a chemical compound in male blue crabs that is not present in females -- the first time in any species that an entire enzyme system has been found to be activated in only one sex.

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Keywords: finding, metabolite, sex

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1. Sex and prenatal hormone exposure affect cognitive performance, Yerkes scientists find
   04-12-2007 · EurekAlert!
   In one of the first research studies to assess sex differences in cognitive performance in nonhuman primates, researchers at the Yerkes National Primate Research Center have found the tendency to use landmarks for navigation is typical only of females. This finding corroborates findings in rodents and humans and is available in the online edition of Hormones and Behavior.
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2. Stem cell research produces a key discovery for Fragile X Syndrome
   09-10-2007 · EurekAlert!
   An important finding has been made by McMaster researchers about Fragile X Syndrome, a sex-linked genetic disorder that affects approximately one in 4,000 males and one in 6,000 females.
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3. Species thrive when sexual dimorphism broadens their niches
   05-09-2007 · EurekAlert!
   Some Caribbean lizards' strong sexual dimorphism allows them to colonize much larger niches and habitats than they might otherwise occupy, allowing males and females to avoid competing with each other for resources and setting the stage for the population as a whole to thrive. The finding, reported this week in the journal Nature, suggests sex differences may have fueled the evolutionary flourishing of the Earth's wildly diverse fauna in a way not previously appreciated by scientists.
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4. Older African-American men with HIV often have sex without condoms
   10-15-2007 · EurekAlert!
   Study of 130 African-American men with HIV found that 38 percent didn't use condoms during oral sex, 25 percent during vaginal sex and 22 percent during anal sex, despite good knowledge about HIV and AIDS. Single men with fewer symptoms were most likely to engage in unsafe sex. This is a worrying finding, say the Philadelphia-based authors, as US figures for 2005 show that 44 percent of all new cases of HIV were in black males.
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5. Males with a female twin may be at higher risk for anorexia nervosa
   12-03-2007 · EurekAlert!
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6. With fruit fly sex, researchers find mind-body connection
   11-30-2006 · EurekAlert!
   The fruit fly gene "doublesex" is responsible for ensuring that male flies look male and females look female. New Brown University research led by biologist Michael McKeown shows that doublesex not only helps shape bodies but also shapes behavior, acting with together with the gene "fruitless" to guide flies' courtship routines and responses. The finding, published in Nature Genetics, shows that sexual development in flies -- and, perhaps, in humans -- is a more complicated proposition than previously thought.
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7. Evolution of the sexes: What a fungus can tell us
   01-09-2008 · EurekAlert!
   Fungi don't exactly come in boy and girl varieties, but they do have sex differences. In fact, a new finding from Duke University Medical Center shows that some of the earliest evolved forms of fungus contain clues to how the sexes evolved in higher animals, including that distant cousin of fungus, the human.
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8. Influence of sex and handedness on brain is similar in capuchin monkeys and humans
   08-29-2007 · EurekAlert!
   A recently published paper by Associate Professor of Psychology and Biology Kimberley A. Phillips (Hiram College), Chet C. Sherwood (George Washington University) and Alayna L. Lilak (Hiram College), reports finding both sex and handedness influences on the relative size of the corpus callosum. The researchers' contribution appears in PLoS ONE, the online, open-access journal of the Public Library of Science. The paper can be read at: http://www.plosone.org/doi/pone.0000792.
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   08-20-2007 · EurekAlert!
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10. Equal level of commitment and relationship satisfaction found among gay and heterosexual couples
    01-22-2008 · EurekAlert!
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