Figure 1.

A: Phenotype of SLW mice and their normal littermates at postnatal day five. The slw/slw mouse shows dwarfism and stomach distention. The asterisks indicate milk in the stomach. B: Autopsy results of the GI tract of normal mice and their slw/slw littermates at postnatal day ten. The lower level of the esophagus was cut, and the stomach was removed. The stomach of the slw/slw mouse is slightly larger than that of the normal mouse; milk did not enter the intestine, which is dilated and filled with gas. The asterisks indicate milk in the stomach and small intestine, and the double asterisk indicates meconium. C: The autopsied GI tract samples of slw/slw mice show that the intestinal tract was distended and filled with gas.