MM 4-64 Fixable Membrane Stain

MM4-64 Fixable Membrane Stain is a lipophilic probe optimized for selective plasma membrane labeling. In aqueous solution, it exhibits minimal fluorescence, however, upon binding to the outer leaflet of the plasma membrane, it produces robust fluorescence, enabling precise and reliable membrane visualization. The binding kinetics are both rapid and reversible, supporting its use in aldehyde-based fixation protocols without compromising staining integrity. Furthermore, MM4-64 Fixable Membrane Stain is particularly valuable in neuroscientific applications for identifying active neurons and examining mechanisms involved in activity-dependent vesicle cycling.