ReadiLink™ iFluor® 488 Oligo and ssDNA Labeling Kit enables simple and uniform tagging of single-stranded DNA or oligos with iFluor® 488, our bright, photostable and green-fluorescent fluorophore. This labeling kit uses our proprietary terminal deoxynucleotidyl transferase (TdT) to catalyze non-template directed nucleotide incorporation onto the 3’- end of single-stranded DNAs or oligos. The kit is optimized for efficient labeling and contains all the essential reagents required for efficient labeling of ssDNA or oligos. The resulting iFluor® 488-labeled DNA probes are ideally suited for biological applications, e.g., electrophoretic mobility shift assays (EMSA), Northern and Southern blots, colony or in situ hybridizations.