Results demonstrate the signal stability of the ScanLater Assay System. Three dilutions of Transferrin were separated by electrophoresis and transferred to an Immobilon FL membrane and probed with rabbit anti-transferrin. Blots were incubated with the ScanLater Eu-labeled Anti-rabbit Secondary Antibodies. Membranes were measured on day 1 and day 30. Results represent a three-fold serial dilution of transferrin 1x sample buffer was loaded on a 4-20% gradient gel run for 30 min. Proteins were transferred to an Immobilon FL membrane and probed with rabbit anti-transferrin overnight at 4˚C followed by incubation with europium-labeled anti-rabbit IgG for 1 hr. Blots were washed, dried, and scanned on the same day and after a month using a SpectraMax Paradigm Reader.