Figure 4.

Diagram showing the location of sequence motifs and proposed functional regions within Xenopus RapA and RapB which are members of the Scd6p family. Blocks indicate the conserved Sm-I and Sm-II motifs (orange) that constitute the Sm-like domain, the conserved FDF domain (pink) and the more variable blocks of RGG repeats (green), serine/threonine-rich regions (yellow) and proline-rich regions (violet). RAPA and RAPB genes are differentially expressed during oogenesis: RAPA during early oogenesis when mRNP synthesis is maximum, RAPB throughout oogenesis and into early embryogenesis when maternal mRNAs are being translated and degraded.