electron-immunocytochemical staining for three intermediate filament ( if ) proteins , keratin ( k ) , glial fibrillary acidic protein ( gfap ) , and vimentin ( v ) , and for the macrophage marker , ebm/11 ( e ) , was performed on epiretinal membranes obtained during vitrectomies performed for proliferative vitreoretinopathy ( pvr ) , postdetachment macular puckers ( pdmps ) , idiopathic macular puckers ( imps ) , or macular puckers associated with other disease processes .
C0021769
intermediate filament
C0042666
vimentin