<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Hi Jyoti,<div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>See this previous mailing list message: <a href="https://www.cgl.ucsf.edu/pipermail/chimera-users/2020-October/017367.html" class="">[Chimera-users] issues with visualization of saxs models in chimera</a></div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>Basically, Chimera has problems with these fake molecules where the atoms are on a regular grid and you need to prevent Chimera from trying to create bonds between these "atoms". You do that by changing all the ATOM records into HETATM records (see the linked message above). I've attached versions of the files you sent with the ATOMs changed to HETATMs, and they work fine in Chimera.</div><div class=""><br class=""></div><div class=""><div class="">--Eric</div><div class=""><br class=""></div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>Eric Pettersen</div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>UCSF Computer Graphics Lab</div><div class=""><br class=""></div><div class=""></div></div></body></html>