GO:0003198

epithelial to mesenchymal transition involved in endocardial cushion formation

Details: 
A transition where a cardiac epithelial cell loses apical/basolateral polarity, severs intercellular adhesive junctions, degrades basement membrane components and becomes a migratory mesenchymal cell that will contribute to the formation of the endocardial cushion. [GOC:mtg_heart]
Evidence Code: 
IDA