Optimised small chemical Rock-inhibition (RI) in preimplantation mouse embryos.
RI disrupts tight-junction formation and apical-basolateral intra-cellular polarisation.
RI causes ectopic outer-cell Hippo-signalling and mis-localised basolaterally enriched Amot
RNAi confirms Amot as sole mediator of RI derived Hippo-signalling defects
Rock, via regulating Amot localisation/function, ensures correct cell lineage gene expression