Fig. 3

Genomic structure of a TOC1 (PRR1) and b LHY and CCA1 in Arabidopsis (At) and barley (Hv). Exons are numbered; 5′ and 3′ UTRs are open boxes; coding sequences are dark boxes, except domain-encoding exons. There may be further 5′ UTR sequence upstream of the HvLHY exon 1 designated in the Figure (dotted line) which has not yet been fully sequenced