Remdesivir monophosphate is linked to the growing RNA chain by the RdRp enzyme from SARS-CoV2. Pyrophoshate is spliced off, on the right. Magenta Mg2+ ions.
Comparison of endogenous peptide (Leu-enkephalin) with a plant alkaloid (morphine) and the smallest chemical structure with similar activity (pethidine).
Substrate folate (blue) in the active site of Dihydrofolate reductase (yellow), with cofactor NADPH below (magenta).
Docking, with Autodock, of a steroid to an antibody to predict the binding site.