Assays that use IRDye 800CW conjugates (such as in vivo imaging and cell binding assays) may require a "dye-only" control for potential effects or retention of the dye.
Carboxylate (non-reactive) form of IRDye 800CW is an ideal control.
Note: The carboxylate dye has no reactive group and cannot be used for labeling.
As a control for cell-based assays that monitor binding of a dye-labeled agent.
For evaluation of behavior and clearance of the dye itself.
As a standard to determine the amount of unreacted ("free") dye after IRDye 800CW conjugation and purification.
Residual unreacted dye may cause: