"Proteolytic cleavage activates epithelial sodium channel (SCNN) by removal of specific segments in finger domains of alpha and gamma subunits. Data suggest that the lower "palm" domain of SCNN1A is essential for allosteric activation of the SCNN heterotetramer [SCNN1A(1)-SCNN1B-SCNN1A(2)-SCNN1G]"xsd:string