27 citations
,
  June 2005   in “The journal of investigative dermatology/Journal of investigative dermatology”    The study found that variations in hair protein genes are likely due to evolutionary deletions or duplications.  
     
           62 citations
,
  January 2004   in “The journal of investigative dermatology/Journal of investigative dermatology”    A second domain of high sulfur KAP genes on chromosome 21q23 is crucial for hair structure.  
               17 citations
,
  June 2003   in “The journal of investigative dermatology. Symposium proceedings/The Journal of investigative dermatology symposium proceedings”    Mutations in hKAP1 genes may cause hereditary hair disorders.  
               100 citations
,
  December 2002   in “Journal of biological chemistry/The Journal of biological chemistry”    Researchers mapped and categorized specific keratin-associated protein genes on human chromosome 21q22.1.  
               48 citations
,
  November 2002   in “Journal of biological chemistry/The Journal of biological chemistry”    Genetic variations in hair keratin proteins exist but don't significantly affect hair structure.  
               24 citations
,
  February 2002   in “The journal of investigative dermatology/Journal of investigative dermatology”    Two new proteins, hKAP1.6 and hKAP1.7, are found in the hair follicle cortex.  
     
           98 citations
,
  June 2001   in “Journal of biological chemistry/The Journal of biological chemistry”    A cluster of sulfur-rich hair protein genes was found on chromosome 17.  
               235 citations
,
  July 1999   in “Journal of biological chemistry/The Journal of biological chemistry”    Human hair is made up of different keratins, some strong and some weak, with specific types appearing at various stages of hair growth.  
     
           48 citations
,
  July 1993   in “The journal of investigative dermatology/Journal of investigative dermatology”    Hair growth is controlled by specific gene clusters and proteins, and cysteine affects hair gene expression in sheep.  
               67 citations
,
  December 1990   in “The journal of cell biology/The Journal of cell biology”    Researchers found genes for cysteine-rich proteins that form the protective layer of hair in humans and sheep.