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January 2001 in “Bioscience Biotechnology and Biochemistry” Ubiquitin, a protein, is found in hair, nails, and skin.
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January 2020 in “PeerJ” Keratin peptides in hair might help identify gender and ethnicity.
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July 2006 in “Journal of Investigative Dermatology” K25, K27, and K28 are found in all inner root sheath layers of hair, while K26 is only in the cuticle.
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January 2021 in “ScienceAsia” Using an enzyme and keratin treatment can significantly repair and strengthen damaged hair.
May 2025 in “Journal of Developmental Biology” Jawless vertebrates have teeth proteins similar to those in mammalian hair and nails.
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May 2011 in “Experimental Dermatology” Sheep have 17 keratin genes, similar to humans, but with different expression patterns affecting wool and hair.
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October 1995 in “Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression” hHb1, hHb3, and hHb6 mRNAs start expressing at the same time in hair follicles.
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January 2024 in “Scientific reports (Nature Publishing Group)” Human hair was used to make biodegradable plastic films that could be useful for packaging and disposable products.
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January 1985 in “ACTA HISTOCHEMICA ET CYTOCHEMICA” Tumor cells in calcifying epithelioma of Malherbe resemble hair follicle cells.
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January 2026 in “Health Food & Biotechnology” A hair serum with 3% keratin from chicken feathers made hair smoother, shinier, and more elastic.
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March 1993 in “The EMBO Journal” Keratinocyte growth factor significantly alters skin and tissue development.
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research Hair
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July 2005 in “European Journal of Cell Biology” Terrestrial vertebrates have balanced keratin gene clusters, unlike teleost fish.