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@@ -487,7 +487,7 @@ Q17: Does any of the cluster representatives ressemble the reference NMR structu
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-In the blind protein-protein prediction experiment [CAPRI](http://capri.ebi.ac.uk/) (Critical PRediction of Interactions), a measure of the quality of a model is the so-called ligand-RMSD (l-RMSD). It is calculated by fitting on the receptor chain (E2A or chain A in our case) and calculating the RMSD on the backbone of the ligand (HPR or chain B in our case). 
+In the blind protein-protein prediction experiment [CAPRI](https://www.ebi.ac.uk/pdbe/complex-pred/capri/) (Critical PRediction of Interactions), a measure of the quality of a model is the so-called ligand-RMSD (l-RMSD). It is calculated by fitting on the receptor chain (E2A or chain A in our case) and calculating the RMSD on the backbone of the ligand (HPR or chain B in our case). 
 
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 Q18: Give and explain the equation to calculate the RMSD.