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This pharmacokinetic profile, combined with its amphiphilic character (allowing it to cross the blood-brain barrier), has sustained interest in DSIP as both a research tool and a subject of investigation in its own right

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Kang J, Mehta S, Turano FJ (2004) The putative glutamate receptor 1.1 ( AtGLR1.1 ) in Arabidopsis thaliana regulates abscisic acid biosynthesis and signaling to control development and water loss

But we don't all react in the same way

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And then the third is glutamine