Valinomycin is a cyclododecadepsipeptide potassium-selective ionophore antibiotic that is isolated from various strains of Streptomyces. The hydrophilic interior is the right size to accommodate the potassium ion, but not other ions, while the hydrophobic exterior allows the complex to pass through the lipid...

The PtdIns phosphates play an important role in the generation and transduction of intracellular signals. PtdIns-(4,5)-P2-biotin is an affinity probe which allows the PIP2 to be detected through an interaction with the biotin ligand. This design allows PtdIns-(4,5)-P2 to serve as a general probe for any protein with...