Hi Frieda, In the past we could not use the BioMolecular Explorer because the 3D plugin you were using was unfortunately not yet supported for our computer systems. Therefore we highly appreciate that you change to JMol and we will certainly use parts of the course for students training in Berlin next year. I completely agree that JMol is an excellent choice. we developed some tutorials which you might find useful. The Students gave us positive feedback and had a steep learning curve. Here are some topics covered by our tutorials: Tutorial: Comparison of 3D-alignments and sequence alignments Tutorial: Mixing sequence and structure Tutorial: Annotated residue selections Tutorial: Superposition of proteins and multiple structure alignments Tutorials are found in the menu Tutorials of STRAP ( google search "strap" ). JMol is an integral part Independently of the tutorials you might also form HTML links for particular PDB codes as the following example http://www.charite.de/bioinf/strap/ce.php?pdb=1gg2 This example shows the entire hetero-trimeric G-protein as well as the single alpha, beta and gamma chains. It marks active site residues and shows which sequence regions are conserved in evolution and which are variable. I hope that this could be useful and helpful to you Regards Christoph