Profile: Tef Labs develops fluorescent & molecular probes that have better quantum yield, improved sensitivity and selectivity, reduced photobleaching, longer wavelengths, leakage resistance & ratiometric properties. We offer indicators, ionophores, general fluorophores and surfactants. We also offer ion indicators, probes for electrophysiology, probes for receptors & ion channels, probes for RNA/DNA, pH indicators, live cell function probes, probes for in situ hybridization, membrane potential, probes for signal transduction and pKC indicators.