Caspase+Kit

Original Protocol:

//Active Caspase-3 Staining Protocol//
 * Place some 1X PBS on ice.
 * Determine total amount of experimental samples (tests) and calculate the amount of BD Perm/Wash buffer (1X) and antibody you will need so that each test will have 100 uL BD Perm/Wash buffer (1X) and 20 uL antibody.
 * Number of Tests: 5
 * Number of Cells = (Number of Tests)*1*10^6 = 5*1*10^6 cells = 5*10^6 cells (4*10^6 Jurkat cells and 1*10^6 3T3 cells)
 * Perm/Wash Volume = (Number of Tests)*0.1 mL = 0.5 mL
 * Note that more Perm/Wash 1X will be needed for all of the different washes
 * Approximate amount needed = (0.5*2+0.1+1+0.5)*(Number of Tests) = (0.5*2+0.1+1+0.5)*(5) = 13 mL
 * Maybe make 15-20 mL
 * Antibody Volume = (Number of Tests)*20*uL = 5*20 uL = 100 uL
 * Dilute the needed amount of BD Perm/Wash buffer (10X) 1:10 in distilled water prior to use. Note: Precipitate may be occasionally observalbe with the BD Perm/Wash buffer (10X) which will not effect performance of the buffer. The precipitate may be removed by filtering the 1X solution through a 0.45 um filter
 * Detach adherent cells with trypsin if necessary. The cells may wash off with PBS alone.
 * May want to transfer cells to the type of tube that will be used for flow cytometry (12X75 mm round bottom).
 * May want to count the number of dead cells using trypan blue before fixing the cells.
 * Wash cells twice with cold 1X PBS, then resuspend cells in BD Cytofix/Cytoperm solution at a concentration of 1*10e6 cells/0.5 mL
 * Cells may be washed by adding solution, centrifuging (1,000-4,000 rpm for 5 min), decanting supernatent (don't remove the cells!), and resuspending.
 * Incubate cells for 20 min on ice.
 * Pellet cells, aspirate, and discard BD Cytofix/Cytoperm solution; wash twice with BD Perm/Wash buffer (1X) at a volume of 0.5 mL buffer/1*10e6 cells at room temperature
 * Resuspend cells in the above calculated BD Perm/Wash buffer (1X) (100 uL) plus antibody (20 uL) and incubate for 30 min at room temperature. Make sure to keep the solutions in the dark so that light does not damage the dye.
 * Wash each test in 1.0 mL BD Perm/Wash buffer (1X), then resuspend the test in 1 mL BD Perm/Wash buffer (1X) and analyze by flow cytometry.
 * Note that the original protocol says that you should resuspend in a final volume of 500 uL, but 1 mL works better for the flow cytometer.