Adenine nucleotides in thiamine deficient rat brain.

The net levels and turnover of ATP, ADP, and AMP were measured in the cortex and brainstem of thiamine deficient and control rats. In spite of a 63% decrease in pyruvate decarboxylase activity in the brainstem of severely deficient rats, metabolism of the adenine nucleotides was unaffected. These data indicate a major reserve capacity for pyruvate decarboxylase and show that the adenylate pool is not significantly altered in thiamine deficient rat brain.