research Immunohistochemical Study on Keratin Expression in Rat Hair Tissues Using Anti-Hair Keratin Monoclonal Antibodies July 1990 in “PubMed” Hair germ cells differ from epidermal cells in keratin expression, and specific keratins form after hair differentiation.
research An Immunohistochemical Study on the Normal Human Skin Using an Anti-Hair Keratin Monoclonal Antibody (HKN-2) February 1985 in “PubMed”
research Trichilemmoma: Cell Biology of the Normal Human Outer Root Sheath January 1995 in “Skin Cancer” The outer root sheath in hair follicles changes during growth, with different keratinization processes in its layers.
research An Immunohistochemical Study on the Normal Human Anagen Hair and Hair Follicle Using Anti-Hair Keratin Monoclonal Antibodies (HKN-5, HKN-6, HKN-7, and HKN-8) October 1985 in “PubMed”
research A Novel Human Type II Cytokeratin, K6hf, Specifically Expressed in the Companion Layer of the Hair Follicle 139 citations , December 1998 in “The journal of investigative dermatology/Journal of investigative dermatology” K6hf is a unique protein found only in a specific layer of hair follicles.