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Zhang Z, Liu H, Shi Y, Xu N, Wang Y, Li A

More recent work by Jerry Turner and others [29, 41] has provided substantial data supporting the presence of two distinct paracellular pathways: the pore pathways that transports ions and small uncharged molecules, and the leak pathway that transports larger molecules regardless of charge

Causal atlas between inflammatory bowel disease and mental disorders: a bi-directional 2-sample Mendelian randomization study

We note that an intramolecular H transfer is geometrically favorable (vide infra), bolstering the likelihood of such a mechanism

Therefore, it stands to reason that we would need to look at other sources of it