Product Introduction SNAP-Surface® Alexa Fluor® 546 is a photostable fluorescent substrate that can be used to label SNAP-tag® fusion proteins in solution or on the surface of living cells. This is a cell impermeable substrate based on Alexa Fluor 546 It is suitable for standard TAMRA or Cy3 filter sets It has an excitation maximum at 558 nm and emission maximum at 574 nm Bioz Badge Exists : True Catalog # Size Concentration S9132S 50.0 nmol