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  July 2009   in “The journal of investigative dermatology/Journal of investigative dermatology”
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  July 2009   in “The journal of investigative dermatology/Journal of investigative dermatology”    Human beard hair medulla contains a unique and complex mix of keratins not found in other human tissues.  
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  October 1997   in “Journal of biological chemistry/The Journal of biological chemistry”    Trichohyalin is modified by enzymes to form strong structures in hair cells.  
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  June 1998   in “The journal of investigative dermatology/Journal of investigative dermatology”    PAI-2 helps in the maturation and protection of hair and nail cells.  
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  November 2010   in “Journal of morphology”
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  November 2010   in “Journal of morphology”    Antler velvet hair and body hair of red deer have different structures that help with protection and insulation.