Abbildung 1: Sex mismateched stem cell transplantation
Sex mismatched stem cell transplantation to track progeny cells: claims on the plasticity of stem cells often rely on the appearance of Y-positive cells in female recipients of male bone marrow transplant donors (left). Injection of marked bone marrow cells from female donors into male recipients is more suitable to demonstrate fusion events because marked Y chromosome-positive cells found in the recipient must have been formed by a fusion event (right).