Fig. 4. Cortical GPR-1/2 distribution. Early two-cell stage embryos of the indicated genotypes stained with antibodies against GPR-1/2 (red) and -tubulin (green); DNA is shown in blue. Left panels show GPR-1/2 staining alone, right panels the merge of the three signals. See also Figs S2 and S3 in the supplementary material for four-cell stage embryos and corresponding quantifications of GPR-1/2 cortical distribution. Scale bar: 10 µm.