Data Analysis on the S3™ Cell Sorter

HeLa cells were transfected with GFP and sorted by forward and side scatter, singlets, and GFP expression. A–B, presort analysis of GFP-positive cells; C–D, postsort population was sorted to >98% purity. Postsort analysis revealed that a pure GFP-positive population was successfully sorted.

SPHERO rainbow calibration particles (8 peaks) were excited by both 488 nm and 561 nm lasers. Emission was measured by all four detectors. Between peaks, all channels displayed a coefficient of variation (CV) <2.5 units. The FL3 channel displays the seven lowest peaks. The eighth peak is offscale due to the brightness of the signal intensity.

Carryover between samples is minimized using the “lock and load” backflushing system. FITC-labeled beads were run on the instrument (A). Subsequently, PE-labeled beads were run (B), followed by a repeated cycle of FITC-labeled beads (C) and PE-labeled beads (D). Each time, carryover of fluorescently labeled beads was analyzed and showed minimal carryover between samples.