"The three regulators (PPP1R2 PPP1R7 and PPP1R11)share localization with PP1gamma2 in the head and the principal piece of sperm. We show that the association of inhibitors to PP1gamma2 changes during epididymal sperm maturation. In immotile caput epididymal sperm PPP1R2 and PPP1R7 are not bound to PP1gamma2 whereas in motile caudal sperm all three inhibitors are bound as heterodimers or heterotrimers."xsd:string