The attachment of an adhesion molecule in one cell to a nonidentical adhesion molecule in an adjacent cell.

Cell recognition between cells. May involve the formation of specialized cell junctions.

The process whose specific outcome is the progression of the aggregate over time, from its formation to the point when a slug is formed. Aggregate development begins in response to starvation and continues by the chemoattractant-mediated movement of cells toward each other. The aggregate is a multicellular structure that gives rise to the slug.

Any process involved in the controlled self-propelled movement of a cell that results in translocation of the cell from one place to another.

A cell-cell recognition process by which a cell distinguishes between self and non self during cooperative behavior, such as early development.

Development a structure consisting of multiple co-operating unicellular organisms of the same species. Examples include sorocarp development in Dictystelia and co-operative colonial structures formed by Myxococcus xanthus for the purpose of predation and fruiting body formation.

That part of a multicellular organism outside the cells proper, usually taken to be outside the plasma membranes, and occupied by fluid.

The leaflet of the plasma membrane that faces away from the cytoplasm and any proteins embedded or anchored in it or attached to its surface.

Any protein complex that is capable of carrying out some part of the process of cell-cell adhesion.