• Substrate for SNAP-Tag®*: allows bright, orange fluorogenic visualization of any SNAP-tag® fusion protein of interest (POI) in live or fixed cells and tissues
• Superior alternate to SNAP-Cell TMR-Star as it has faster labeling kinetics

SPY555-BG is a benzylguanine (BG) derivative of the SPY™555 fluorophore. BG is the substrate for SNAP-tag®, which forms a covalent bond upon reacting with it. This enables the permanent labeling of any POI that is expressed as a SNAP-tag® fusion, allowing fluorescent imaging of your POI in live or fixed cells.

Key features

• Ab: 555 nm, Em: 580 nm – orange spectrum
• Cell permeable
• Works on live and fixed cells and tissues
• Compatible with further immunostaining after fixation
• Fluorogenic character: enhanced fluorescence when bound to SNAP-tag®
• Compatible with widefield, confocal, SIM and STED imaging

SNAP-tag®is a registered trademark of New England Biolabs