Thyroid status influences rat serum but not brain TRH pyroglutamyl aminopeptidase activities.

Abstract

Serum and brain cytosol contains pyroglutamyl aminopeptidase activity that converts TRH to His-ProNH2 (TRH PAPase). Whereas serum TRH PAPase has specificity for TRH, this is not the case for brain cytosol PAPase. Recent reports indicate that a brain membrane fraction contains TRH PAPase that is specific for TRH and has a remarkable similarity to serum TRH… (More)

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