Keratin extracted from wool shows many interesting and peculiar properties, often depending onthe extraction method used, that makes keratin an interesting material in many sectors like biomedical, filtering, cosmetic, agricultural, etc. [10]. As a biomaterial, wool keratin is biocompatible,biodegradable and able to support cell attachment and spreading [11].There are different viewpoints to classify keratins. They have been classified as ―hard keratin‖and ―soft keratin‖ according to their physical and chemical properties, particularly to the sulfur amount; type I or acidic keratin and type II or neutral-alkaline keratin on the basis on the predominant amino acids; α-keratin and β-keratin on the basis of their secondary structure. Keratin can also be distinguished according to their biosynthesis and their molecular weight [12]–[14].