Hello, I am trying to make a morph between PDB entries 9SKS and 9SKT. The protein does what I want, but I can't find out how to include the active site :ZN in the interpolation. This ion is consistently numbered between both structures, and I give model numbers to the morph command, which should select the entire models including their ions. Nothing about this in the documentation. What am I missing? If interpolating ions with morph is impossible to do for some reason, then it would be helpful to list it in the "limitations" section<https://www.cgl.ucsf.edu/chimerax/docs/user/commands/morph.html#limitations> of the command's documentation. Thank you in advance, Guillaume --- Guillaume Gaullier, PhD Researcher, Blikstad group Molecular Biomimetics / Microbial Chemistry Department of Chemistry - Ångström Uppsala University Regementsvägen 10 752 37 Uppsala Sweden När du har kontakt med oss på Uppsala universitet med e-post så innebär det att vi behandlar dina personuppgifter. För att läsa mer om hur vi gör det kan du läsa här: http://www.uu.se/om-uu/dataskydd-personuppgifter/ E-mailing Uppsala University means that we will process your personal data. For more information on how this is performed, please read here: http://www.uu.se/en/about-uu/data-protection-policy