https://www.selleckchem.com/pr....oducts/FK-506-(Tacro
Epithelium acts as a barrier separating the interior and exterior of the body, and the epithelial and endothelial cells form tight junctions (TJs) by sealing the paracellular space. The blood-brain barrier (BB endothelial cells have well-developed TJs and express specific polarized transport systems to tightly control paracellular movements of solutes, ions, and water. Thus, more than 98% of small-molecular-weight drugs cannot pass the BBB. The tricellular TJ (tTJ) is a structure at contacts of three cells. Angulin-1, also
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