apical plasma membrane urothelial plaque
A scallop-shaped plaque, also referred to as an asymmetric unit membrane (AUM), found in the apical plasma membrane of urothelial superficial (umbrella) cells which form a a barrier to the passage of water and soluble toxic compounds found in urine. The plaques are thickened regions of membrane composed of uroplakin transmembrane proteins which form a crystalline array.
GO:0005886
plasma membrane
is_a
GO:0098590
plasma membrane region
is_a
GO:0016324
apical plasma membrane
part_of
AUM
related
asymmetric unit membrane
exact