Tetrahydrocannabinolic acid is a potent PPARγ agonist with neuroprotective activity. 16 Jul Dr D Affinity and Efficacy Studies of Tetrahydrocannabinolic Acid A at Cannabinoid Receptor Types One and Two. Binding and Signaling Studies Disclose a Potential Allosteric Site for Cannabidiol in Cannabinoid CB2 Receptors