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Description
It is not only expressed in liver (sinusoidal membrane) but also in other organs like brain, kidney and intestine (gut lumen) (van de Steeg et al., 2012

This is why the tyrosine plus theanine pairing is so common, especially alongside caffeine, because it can feel more controlled and less jittery than caffeine alone

10.1073/pnas.0408384102

Biologishe Untersuchungen
