Schematic illustration of spatiotemporal expression of Oct60 , Oct25 and Oct91 during Xenopus embryogenesis. (A) Temporal expression of Oct60, Oct25 and Oct91 in different stages of development. Reproduced from  with minor modifications. (B) Spatial distribution of Oct60, Oct25 and Oct91 transcripts in fertilized egg, blastula and gastrula embryos. Heavier color represents higher level of transcription. bc: blastocoel; bl: dorsal blastopore lip.