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Titration of the optimal ratios of multicomponent biochemical reactions can be a laborious task. This protocol describes how to explore ∼10,000 combinations of concentrations of one to three reaction components with a droplet-based microfluidics platform.
Physiologically relevant ligands for mammalian odorant receptors have been elusive. A mouse odorant receptor–based bioassay has now been used to guide purification and identification of a natural ligand that mediates attraction of female mice to male urine.
A new high-throughput method for monitoring G protein–coupled receptor activation is highly suited to assaying Gα12/13-coupled receptors and is used to deorphanize a group of receptors activated by lysophosphatidylserine.