<Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (September 2014) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (September 2014) (Learn how and when to remove this template message) </Td> </Tr> <P> Cell adhesion is the process by which cells interact and attach to a surface, substrate or another cell, mediated by interactions between molecules of the cell surface . Cell adhesion occurs from the action of transmembrane glycoproteins, called cell adhesion molecules . Examples of these proteins include selectins, integrins, syndecans, and cadherins . Cellular adhesion is essential in maintaining multicellular structure . Cellular adhesion can link cells in different ways and can be involved in signal transduction . Cell adhesion is also essential for the pathogenesis of infectious organisms . </P> <P> Protozoans express multiple adhesion molecules . An example of a pathogenic protozoan is the malarial parasite (Plasmodium falciparum), which uses one adhesion molecule called the circumsporozoite protein to bind to liver cells, and another adhesion molecule called the merozoite surface protein to bind red blood cells . </P>

A group of transmembrane proteins involved in maintaining cell structure
find me the text answering this question