Tandem dye degradation on compensation beads (Flow Cytometry (Compensation))

Question

Accepted Answer

Tandem fluorophore compensation beads show spectral shift or altered emission profile over time, causing incorrect spillover calculation and poor compensation in acceptor channels. Common causes: 1) Tandem dyes (PE-Cy5, PE-Cy7, APC-Cy7, etc.) degraded due to light exposure during storage 2) Stale bead controls prepared hours or days before use allowing dye degradation 3) Prolonged room temperature storage of stained beads before acquisition 4) Using compensation matrix from previous experiment without fresh bead preparation Solutions: 1) Prepare fresh compensation bead controls immediately before each acquisition session 2) Protect all tandem dye-stained beads from light exposure during preparation and storage 3) Re-generate compensation matrix for every experiment, do not reuse old matrices 4) Store tandem dye antibodies at 4°C in dark conditions and check expiration dates 5) Minimize time between bead staining and flow cytometer acquisition