the bundles of cytokeratin and vimentin filaments progressively unravel into protofilament-like threads of 2-4 nm diameter , and intermediate filament protein is included in numerous , variously sized ( 0.2-1.5 microns ) spheroidal aggregates containing densely stained granular particles of 5-16 nm diameter .
C0010803
cytokeratin
C0021769
intermediate filament protein