Fig. 9. Organisation of cis-regulatory regions of the deltaD locus. Six regulatory regions and two quantitative enhancers (en) were identified within 12.5 kb of the deltaD locus. Representative in situ hybridisation experiments have been allocated to the corresponding genomic regions with respect to expression in neuroectodermal (above) or mesodermal derivatives (below). Regulatory regions sufficient to direct expression in specific expression domains are indicated by the surrounding bars, whereas regulatory regions necessary for transgene expression (HI and HII) are indicated by boxes.