Biology
keratin
Term: keratin
Literally meaning: ?protein of horn?
Origin: Anc Greek
?????/keras(=horn) > (genitive): ???????/keratos
Coined/History
The word appeared in literature around 1849 but the first attempt to extract keratins was by John Hoffmeier in 1905.
Definition
Keratins is a group of insoluble and tough fibrous proteins that are the main structural component in skin, nails, hair, horns, feathers, hooves and teeth. Keratins are rich in sulfur-containing aminoacids such as cysteine.
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Cysteine (cys C)
Term: cysteineLiterally meaning: ?pertaining to bladder?Origin: Anc Greek?????? (=sac or anatomical sac such as bladder)> ??? (=to carry a baby in a sac)Coined/History In 1810 English chemist Wiliam Hyde Wollaston (1766-1828) identified cysteine...
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Scleroderma
Term: sclerodermaLiterally meaning: tough skinOrigin: Anc Greek???????/scleros(=hard, tough)?????/derma(=skin) > ?????/desma(=bonds) because skin keeps the body tight > ????/dero(=to peel, to flay).Coined/Historyin 1847 by Gintrac who based on the...
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Keratosis
Term: keratosisLiterally meaning: horny stateOrigin: Anc Greek?????/keras(=horn)+????/-osis (suffix denoting state or condition eg in medical terminology means "a disease state" )Coined/History(?)Definition Keratosis is a wart-like.benigh growth of keratin...
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Collagen
Term: collagenOrigin: Anc Greek?????/colla(=glue)?????/geno(=produce, give birth to) literally meaning ?glue producer? Coined(?)Definition An important fibrous and insoluble protein which is the main component of connective tissue (skin, bone, cartilage,...
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Tough As Nails
Biology concepts ? keratin, crystalline form, cornification, regeneration, stem cells Horns are made from keratin, just as are nails, hooves, and hair. Believe it or not, this is a real picture of a condition called a cutaneous horn. It is...
Biology