Table 1.

Classes of intermediate filaments [76, 107]

Class	Proteins	Size (kDa)	Cell type
I	Keratins, acidic	40–60	Epithelial cells
II	Keratins, basic	50–70	Epithelial cells
III	Vimentin	54	Mesenchymal cells
	Glial fibrillary acidic protein	51	Astroglial cells
	Desmin	53	Muscle cells
	Synemin	150	Skeletal muscle cells
	Peripherin	57	Neurons
IV	Neurofilaments H, M and L	67, 150, 200	Neurons
	Internexin
			Neurons
V	Lamin A, B, and C	60–75	All
VI	Filensin	94	Lens
	Phakinin	47	Lens
	Nestin	200–240	Neuronal stem cells