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Research Tools

The Probe Report Web Table summarizes information on all probes released. Additional information on Molecular Libraries probes can be found in reference materials.

NIH Molecular Libraries

NIH Molecular Libraries Small Molecule Repository collects samples for high throughput biological screening and distributes them to the NIH Molecular Libraries Probe Production Centers Network

NIH Molecular Libraries


The NIH Clinical Collection and NIH Clinical Collection 2 are plated arrays of 446 and 281, respectively, small molecules that have a history of use in human clinical trials. The collections were assembled through the Molecular Libraries and Imaging Initiative as part of its mission to enable the use of compound screens in biomedical research. These collections are available to researchers for use.

NIH Clinical Collection

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