Our tetramethylrhodamine conjugate of NeutrAvidin® biotin-binding protein – a form of avidin that has been processed to remove carbohydrate and to lower its isoelectric point – can substantially decrease background due to nonspecific binding. The method used to deglycosylate the avidin retains its specific binding. This bright, orange-fluorescent reagent (absorption/emission maxima ~555/580 nm) is ideal for detecting biotinylated targets in fluorescence microscopy applications.