Solution-based indirect affinity selection mass spectrometry--a general tool for high-throughput screening of pharmaceutical compound libraries.

We show here that an automated solution-based affinity selection mass spectrometry (ASMS) system can be built exclusively from commercially available parts. The value of this technology lies in the throughput (~1 × 10(5) compounds/day) coupled with a low hit rate. The system, being a binding assay, requires little development time yielding a fast timeline between target availability and hit identification.