Draw a structure or paste a SMILES string. Retrieval returns the proteins its nearest co-crystal neighbors were solved against, ranked by pharmacophore similarity, in about a tenth of a second.
How deep to search is how many similar ligands hand over their targets. Deeper finds more, and costs no extra time. Minimum similarity drops ligands that stopped resembling yours. Rows to show is just the table; the download and the filter always cover every row. All three stick on this browser.
Screen uses the drawing, and it is free and instant. Docking comes later, from the drill-down, and arrives by email. The name is optional.