FIG. 4.
Reversal of IH15s-induced increase in TH activity by PP2A. TH activity was determined in the extracts of dorsal and ventral medulla derived from rats exposed to normoxia (NOR) or IH15s for 10 days before and after dephosphorylation. For dephosphorylation, aliquots of the medullary extracts were treated with 0.2 units of the catalytic subunit of PP2A for 15 min, as described in the “Methods”. All measurements were made in triplicate and average data are shown as mean ± S.E. (n = 7 rats in each group). Asterisks denote p < 0.01.