tight junction
(redirected from Zonulae occludente)Also found in: Medical.
tight junction
[¦tīt ′jəŋk·shən] (cell and molecular biology)
An intercellular junction composed of a series of fusions of the junctional membrane, forming a continuous seal; serves as a selective barrier to small molecules and as a total barrier to large molecules. Also known as impermeable junction; occluding junction; zonula occludens.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.