MCE Mouse CD4+ CD25+ Regulatory T Cell Positive Selection Kit is designed for the isolation of CD4+ CD25+ regulatory T cells (Tregs) from mouse splenic single-cell suspensions. The kit utilizes a two-step isolation strategy. First, CD4 Enrichment Beads are used to deplete non-target cells and enrich CD4+ T cells. Subsequently, CD25 Capture Antibody specifically binds to CD25+ cells, which are then captured by Releasable Magnetic Beads. Following isolation, the magnetic beads are gently detached from the cell surface using Magnetic Beads Release Buffer, yielding label-free CD4+ CD25+ regulatory T cells with no residual magnetic beads.