Figure 6.

eif6 mutant alleles. A, T-DNA insertional mutant alleles of eIF6A and eIF6B in Arabidopsis. The exons are depicted by boxes, and the introns and intergenic regions are depicted by lines. The T-DNA insertion sites are drawn as triangles (not to scale). LB, T-DNA left border. B, RT-PCR analysis of eif6b-1 and eif6b-2 alleles. C, The eif6a mutants are embryo lethal. Each pair of images is representative of the green seeds (top) and white seeds (bottom) from the same silique. WT, Wild type. D, Three-week-old eif6b-1 and eif6b-2 mutant plants grown under a 14-h/10-h photoperiod.