['Qa-2 protein, the Ped gene product, is linked to the cell surface by a glycosylphosphatidylinositol (GPI) anchor. Some GPI-linked proteins can be spontaneously incorporated into the membranes of cells via a technique called "protein painting."We investigated whether Qa-2 could be painted onto T cells and embryos and whether the painted protein would be functional.', 'Incorporation of Qa-2 into the membranes of T cells and embryos was measured by FACScan and Immuno-PCR, respectively. Function of Qa-2 was measured by cell proliferation.', 'Qa-2 was incorporated by T cells and embryos and was functional.'] Does painting Qa-2 onto Ped slow preimplantation embryos increase the rate of cleavage?