<html><head><base href="x-msg://106/"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi Fei Li,<div>The origin is read from the header, but you can change it within Chimera if you want. Please see these previous posts and further links for more details:</div><div><<a href="http://plato.cgl.ucsf.edu/pipermail/chimera-users/2010-September/005486.html">http://plato.cgl.ucsf.edu/pipermail/chimera-users/2010-September/005486.html</a>></div><div><<a href="http://plato.cgl.ucsf.edu/pipermail/chimera-users/2006-September/000961.html">http://plato.cgl.ucsf.edu/pipermail/chimera-users/2006-September/000961.html</a>></div><div><br></div><div>Best,</div><div>Elaine</div><div>----------<div><div><div><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div><div>Elaine C. Meng, Ph.D. </div><div>UCSF Computer Graphics Lab (Chimera team) and Babbitt Lab</div><div>Department of Pharmaceutical Chemistry</div><div>University of California, San Francisco</div><div><br></div></div></span></div><div><div>On Sep 4, 2010, at 9:35 AM, Fei Li wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div ocsi="x"><div dir="ltr"><font color="#000000" size="2" face="Tahoma">Dear Chimera-dev group,</font></div><div dir="ltr"><font size="2" face="tahoma"></font> </div><div dir="ltr"><font size="2" face="tahoma">I am a graduate student of Computer Science. I come accross aome problems with the Density map (.mrc file). I noticed that Chimera use the Origin index parameters to locate the density map. I am wondering where these index numbers come from? is it read from the MRC header or does chimera do something about the information in mer header file.</font></div><div dir="ltr"><font size="2" face="tahoma"></font> </div><div dir="ltr"><font size="2" face="tahoma">thank you for your help.</font></div><div dir="ltr"><font size="2" face="tahoma"></font></div></div></span></blockquote></div><br></div></div></div></body></html>