Fig. 2.

Molecular characterization of the Ulva UM033_0004 and Um005_0337 insertional mutants. a Exon–intron structure and position of the pPIBT7 insertion. Shaded boxes represent exons, white boxes represent UTRs and lines introns. Open triangles indicate the insertion sites. b Domain architecture of the proteins corresponding to loci UM033_0004 and UM005_0337. Closed triangles indicate the positions where the pPIBT7 insertions interrupt the corresponding transcripts. c Transcript abundance of the identified genes in the insertional mutant lines and untransformed Ulva “slender” control plants. Error bars show the standard error of the mean (n = 3). N.D., not detectable. **, Student’s t test P < 0.01