The linguistic root of tzaraath may mean smiting, in comparison with Arabic, in reference to a Talmudical explanation that it serves as a punishment for sin; it is quite possible that tzaraath was a general term for certain types of skin disease, rather than a particular condition, and the Talmud maintains a similar view, arguing that tzaraath referred generally to any disease that produces sores and eruptions on the skin.
Investigations of keratins extracted from wool by reduction hydrolysis and by alkaline hydrolysis showed that their chemical compositions and secondary structures were similar to original wool. The keratin isolates were similar in amino acid, Amides I and II, and secondary structure to each other and to original wool.
Protein. Feathers and fur, hair and fingernails (even animal hooves), are all made of the protein keratin. Wool is made from sheep hair, and is great for clothing and fabric. Wool is warm and sometimes a little itchy, but it's still widely used.hen we say that polymers are everywhere, we mean it. In fact polymers have been in nature from the beginning. All living things-plants, animals, and people-are made of polymers.