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keratin

more about keratin

keratin


  2  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Keratin  \Ker"a*tin\,  n.  [Gr.  ke`ras,  -atos,  horn.]  (Physiol. 
  Chem.) 
  A  nitrogenous  substance,  or  mixture  of  substances,  containing 
  sulphur  in  a  loose  state  of  combination,  and  forming  the 
  chemical  basis  of  epidermal  tissues,  such  as  horn,  hair, 
  feathers,  and  the  like  It  is  an  insoluble  substance,  and 
  unlike  elastin,  is  not  dissolved  even  by  gastric  or 
  pancreatic  juice.  By  decomposition  with  sulphuric  acid  it 
  yields  leucin  and  tyrosin,  as  does  albumin.  Called  also 
  {epidermose}. 
 
  From  WordNet  r  1.6  [wn]: 
 
  keratin 
  n  :  a  fibrous  scleroprotein  that  occurs  in  the  outer  layer  of 
  the  skin  and  in  horny  tissues  such  as  hair  feathers  nails 
  and  hooves  [syn:  {ceratin}] 




more about keratin