The PI Cell Cycle Reagent for ADAMII™ LS is a propidium iodide‑based stain designed for cell cycle analysis on the ADAMII™ LS automated cell counter. It enables PI staining for cell cycle assay without fixation, is simple to use with ADAMII™ Assay Slides, and supports rapid, label‑based determination of cell‑cycle phases while maintaining cell morphology and workflow efficiency.