Specificfordrebrin,awidespreadactin-associatingproteinof70kD(SDS-PAGEmobilityshowsMr120,000),enrichedatjunctionalplaques,definingaspecific
MICROFILamentanchoragesysteminpolarepithelialcells.Positivestainingwasfoundinmanytissues.EspeciallyprominentinthemesangialcellsofrenalglomeruliandintheSertolicellsoftestis.Negative:hepatocytesandcross-striatedmuscle.