The Darling Lab article “Mass-Added Density Modulation for Sorting Cells Based on Differential Surface Protein Levels” was accepted for publication in Cytometry Part A. This study demonstrated a new methodology for non-binary separation of cells by surface protein expression that makes feasible the enrichment of billions of cells within minutes. This work was featured on the cover of the May 2021 issue. Congratulations to lead author Sylvia Sarnik!