The real benefits of Fragment-Based Drug Discovery (FBDD) such as low entry costs and ease of generating leads can only be achieved with the right quality of initial tool – a Fragment Set. It can furnish desired number of hits, at the same time remaining small in size (200 - 3 000 compounds) hence not requiring significant investment. The fragment library design strongly depends on the screening technique to be employed and is done through rigorous selection criteria. Besides chemical purity, stability and solubility criteria it's essential to pick the representatives of as many molecular clusters as possible.
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