Chromium (51Cr) Release Assay
•9 used to evaluate the in vitro efficiency of Tcytotoxic cell in lysing
•     such target cells as tumor cells, allogenic cells, or viral infected
•     cells
•9 when target cells are lyzed the chromium-labeled proteins are released and amount of chromium released (in the supernatant) is proportional to the quantity of lyzed cells