<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/fcde3e5a-9991-4f51-acda-3db90d7ba899/721C7554-C5DF-4840-A9B9-F5FC4A7F1B26/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://sciencenow.sciencemag.org/cgi/content/full/2008/902/1?rss=1" href="http://sciencenow.sciencemag.org/cgi/content/full/2008/902/1?rss=1" style="font-size: 11px;">sciencenow.sciencemag.org</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://sciencenow.sciencemag.org/cgi/content/full/2008/902/1?rss=1"><H2>Why Men Cheat</H2></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://sciencenow.sciencemag.org/cgi/content/full/2008/902/1?rss=1"><P>By Constance Holden<BR /><EM>Science</EM>NOW Daily News<BR />2 September 2008</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://sciencenow.sciencemag.org/cgi/content/full/2008/902/1?rss=1"><div align="center"><img src="http://content7.clipmarks.com/blog_cache/sciencenow.sciencemag.org/img/4428A597-EF0C-4EBE-9100-FAE5A28909A4" alt="Picture of John Mayer" /></div></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://sciencenow.sciencemag.org/cgi/content/full/2008/902/1?rss=1"><P><STRONG>Meadow vole? </STRONG> Based on new research, musician John Mayer seems like a likely host for two copies of the 334 allele. </P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://sciencenow.sciencemag.org/cgi/content/full/2008/902/1?rss=1">Like meadow voles, some men just don't seem to be built for monogamy, whereas others, like swans, mate for life. New research hints that some of the difference might be due to a single genetic variation.<P> The gene in question, <I>AVPR1a</I>, governs a receptor that regulates the brain's production of vasopressin, a hormone that contributes to attachment behavior with mates and offspring. A few years ago, scientists found that when they added extra copies of the <I>AVPR1a</I> gene to the brains of promiscuous meadow voles, the animals began acting more like monogamous prairie voles, spending more time with partners and grooming offspring. A similar role for the <I>AVPR1a</I> gene has been observed in chimps and bonobos.</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://sciencenow.sciencemag.org/cgi/content/full/2008/902/1?rss=1">Might such a simple switch be found in humans?</blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/721C7554-C5DF-4840-A9B9-F5FC4A7F1B26/blog/" title="blog or email this clip"><img src="http://content8.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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