Author Date Version SOP # Stephanie Swift 26th January 2015 1 H002 Reageants FACS Buffer (2.5g BSA in 500ml PBS) Ficoll (or Leukosep) PBS Tetramer-APC (project-specific) CD8-PerCPCy5.5 (BD Biosciences, Clone RPA-T8) CD3-FITC (BD Biosciences, Clone OKT3) CD28-PE (BD Biosciences, Clone CD28.2) CCR7-PECy7 (BD Biosciences, Clone 3D12) CD45RA-APC-eFluor780 (eBioscience, Clone HI100) Viability Dye-eF450 (eBioscience # 65-0863-14) Objective: This protocol addresses the tetramer/immunophenotyping antibody staining of human PBMCs H003 - Human Tetramer Immunophenotyping Stain 1. Resuspend freshly-isolated PBMCs at 2x10^7 per ml, and plate 100ul (2x10^6 cells) per well of a 96-well U-bottom plate. 2. Wash cells with 100ul FACS buffer. Spin down at 1500RPM for 5 mins. at 4C. 3. Prepare master mix of tetramer, remembering to spin tetramer briefly (3 secs) at 1000RPM before pipetting from the top of the vial. Add 50ul per well for 30 mins. at 4C. See example calculation below for 20 wells:- Tetramer-APC FACS Buffer Dilution 10ul per well - Volume (ul) 200 800 4. Wash in 150ul FACS buffer. Spin down at 1500RPM for 5 mins. at 4C. 5. Wash in 200ul FACS buffer. Spin down at 1500RPM for 5 mins. at 4C. 6. Prepare master mix of phenotyping antibodies; add 50ul per well for 30 mins. at 4C. See example calculation below for 20 wells:- CD8-PerCPCy5.5 CD3-FITC CD28-PE CCR7-PECy7 CD45RA-APC-eFluor780 FACS Buffer Dilution 1:200 1:200 1:20 1:50 1:50 - Volume (ul) 5 5 50 20 20 900 7. Wash in 150ul FACS buffer. Spin down at 1500RPM for 5 mins. at 4C. 8. Wash in 200ul FACS buffer. Spin down at 1500RPM for 5 mins. at 4C. 9. Allow vial of viability to dye to warm up to room temperature before opening. Prepare master mix of viability dye; add 100ul per well for 30 mins. at 4C. See example calculation below for 20 wells:- This protocol is shared by the Stojdl Lab under a creative commons license. Viability Dye-eF450 PBS Dilution 1:1000 - Volume (ul) 2 1998 10. Wash in 100ul FACS buffer. Spin down at 1500RPM for 5 mins. at 4C. 11. Wash in 200ul FACS buffer. Spin down at 1500RPM for 5 mins. at 4C. 12. Final resuspension of cells in 200ul FACS buffer. Filter through nylon mesh just prior to running. Keep cells on ice until running. This protocol is shared by the Stojdl Lab under a creative commons license.