behavior/neurological
• mutants are more sensitive to antinociceptive effects of morphine than wild-type mice
• mutants show a 5-fold increased sensitivity to morphine as measured by antinociception in hot plate tail-flick assay
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homeostasis/metabolism
• in response to somatostatin, there is no influx of calcium measured in aortic smooth muscle cells in mutants compared to wild-type cells which show show an increased calcium level
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