<div>Dear users:</div>  <div>how to fix the center of mass of the protein in the pull simulation? I want to know to know! </div>  <div>Please help me! </div><BR><BR><br><a rel="nofollow" class="plink" target="_blank" href="http://cn.webmessenger.yahoo.com/index.php?t=1&to=eWlkPXpoYW94aWl0YzIwMDI-&sig=703fa929658518b2720b087c59cd85f2dabf8844 "><img class="pimg" style="" alt="4" src="http://opi.yahoo.com/online?u=zhaoxiitc2002&t=4&l=cn" border="0"></a><p>&#32;


      <hr size=1><a href="http://cn.mail.yahoo.com/"> ÑÅ»¢ÓÊÏ䣬ÄúµÄÖÕÉúÓÊÏ䣡</a>