Figure 6-32.
Gene expression of mcmlc2 in a stage 22–23embryo, as detected by whole-mount in situ hybridization. The cone structure becomes more tubular and grows straight from the ventral surface of the embryo toward the inner layer of the abdominal cavity. Scale bar, 250 μm.

Figure 6-33.
Gene expression of mcmlc2 in a stage 23–24embryo, as detected by whole-mount in situ hybridization. The heart tube continues to straighten, and becomes thicker. Scale bar, 250 μm.