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 Immunological Characteristics and Histological Distribution of Human Hair Fibrous Proteins Studied with Anti-Hair Keratin Monoclonal Antibodies HKN-2, HKN-4, and HKN-6 52 citations , February 1986 in “Journal of Histochemistry & Cytochemistry” Some hair proteins are specific to hair, while others are also found in skin cells.
research An Immunohistochemical Study on the Normal Human Skin Using an Anti-Hair Keratin Monoclonal Antibody (HKN-2) February 1985 in “PubMed”
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 Further Immunocytochemical Characterization of Cultured Hair Apparatus Cells March 1995 in “The Journal of Dermatology” Immature hair cells can grow and change into different types of hair cells over time.