Invitrogen™ Di-2-ANEPEQ (JPW 1114)

Description

• Fast-response probes that operate by means of change in their electronic structure, and consequently their fluorescence properties, in response to change in surrounding electric field Optical response is sufficiently fast to detect transient (millisecond) potential changes in excitable cells, including single neurons, cardiac cells, and intact brains Magnitude of their potential-dependent fluorescence change is often small; fast-response probes typically show 2-10% fluorescence change per 100mV Display potential-dependent shift in their excitation spectra, thus permitting quantitation of membrane potential using excitation ratio measurements Cationic molecule; exhibits very low internalization and good signal:noise ratio and is useful for neural network analysis Ex/Em maxima bound to model phospholipid membranes are approximately 465/635nm (but spectral properties are highly dependent on environment) Nonfluorescent until bound to membranes Cationic molecule, soluble in water Detects submillisecond membrane potential changes Dye is introduced into cells by direct addition of stock solution to cell culture medium, by using by retrograde labeling Plasma membrane of cell has transmembrane potential of approximately -70mV (negative inside) as a consequence of K+, Na+, and Cl- concentration gradients that are maintained by active transport processes Potentiometric probes offer indirect method of detecting the translocation of these ions Increases and decreases in membrane potential-referred to as membrane hyperpolarization and depolarization, respectively-play central role in many physiological processes, including nerve-impulse propagation, muscle contraction, cell signaling and ion-channel gating Cell Analysis, Cell Metabolism, Cell Structure, Cell Viability, Proliferation and Function, Membranes (General) and Lipids Order Info Shipping Condition: Room temperature