Figure 1.

Quantitative cellular resolution 3 D gene expression. A. A three-dimensional plot of the Drosophila embryo showing the experimentally measured pattern of eve mRNA as it appears in late Stage 5. There are seven distinct expression stripes located along the anterior-posterior axis (AP) of the embryo, with the intensity of each stripe varying moderately along the dorsal-ventral axis (DV). B. A two-dimensional cylindrical projection of a Stage 5 Drosophila embryo provides an easier visualization of the details of the eve mRNA patterns, showing that expression of each stripe is similar on either side of the ventral mid line (V).