1.13.11.6 astrocyte - 439372, 439373 1.13.11.6 brain - 439373, 439378 1.13.11.6 brain regional distribution 439366 1.13.11.6 brain relatively small amounts 439367 1.13.11.6 hippocampus - -, 675782 1.13.11.6 kidney - 439365, 696784 1.13.11.6 kidney activity is low in newborn, significantly incrEases and remains elevated through the following ages 673130 1.13.11.6 liver - 439364, 439367, 439368, 439369, 439370, 439371, 658927 1.13.11.6 liver specific activity progressively and significantly increases from newborns to 12 months of age 673130 1.13.11.6 plasma - 439373