A glutathione adduct of prostaglandin A1 acts intracellularly to elevate cyclic AMP by inhibiting its extrusion.
Heasley LE, Azari J, Brunton LL. A glutathione adduct of prostaglandin A1 acts intracellularly to elevate cyclic AMP by inhibiting its extrusion. J Cyclic Nucleotide Protein Phosphor Res. 1985; 10(1):3-8.