86 citations
,
April 2009 in “Journal of anatomy” Hard skin features like scales, feathers, and hair evolved through specific protein changes in different animal groups.
5 citations
,
February 2007 in “Cytology and genetics” Gene expression regulates keratin production for normal hair growth.
25 citations
,
August 2020 in “Experimental eye research/Experimental Eye Research” Different types of cells in the eye express specific keratins at various stages of development.
2 citations
,
August 2020 in “Scientific reports” Genes related to keratin, skin cell differentiation, and immune functions are key in hedgehog skin and spine development.
May 2020 in “bioRxiv (Cold Spring Harbor Laboratory)” The study found that certain genes are important for hedgehog skin appendage development and immunity, with spines possibly evolving for protection and infection resistance.
17 citations
,
February 2015 in “Cell Death and Disease” Inhibiting AP1 in mice skin causes structural changes and weakens the skin barrier.
24 citations
,
November 2015 in “Scientific reports” Human hair has a new region with ordered filaments and the cuticle contains β-keratin sheets.
18 citations
,
January 2008 in “Sen'i Gakkaishi” Thioglycolic acid and L-cysteine change hair structure differently during perms, affecting hair strength and curling efficiency.
11 citations
,
January 1989 Two patients had a unique form of trichothiodystrophy with reduced high-sulfur proteins in their hair.
30 citations
,
December 2011 in “Journal of biological chemistry/The Journal of biological chemistry” Keratin 17 is modified by RSK1 in response to growth and stress, affecting skin growth and stress response.
37 citations
,
October 2015 in “PeerJ” Perming significantly changes hair's molecular structure, while shampoo and conditioner do not.
65 citations
,
May 2006 in “Journal of Structural Biology” Hair curliness is due to uneven distribution of different cortices within the hair fiber.
1 citations
,
January 2013 in “PubMed” Permanent wave treatment with thioglycolic acid changes hair structure by altering disulfide bonds.
238 citations
,
October 1994 in “Current opinion in genetics & development” The document concludes that recent research has improved understanding of skin diseases and the balance between cell growth and differentiation in the epidermis.
39 citations
,
February 1990 in “The journal of cell biology/The Journal of cell biology” Trichohyalin, a hair follicle protein, has a part with repeating patterns of 23 amino acids.
April 2026 in “BMC Genomics” Hair type differences in cashmere goats are linked to keratin and cytoskeletal organization.
April 2018 in “Journal of Investigative Dermatology” The keratin network in mouse skin changes during cornification and affects the skin's protective barrier.
356 citations
,
December 1986 in “The journal of cell biology/The Journal of cell biology” Hair and nail cells share similar proteins, indicating a common differentiation pathway.
14 citations
,
May 2017 in “Journal of Investigative Dermatology” A rare gene mutation causes skin fragility and itching without affecting hair or nails.
82 citations
,
January 2006 in “International review of cytology” Vertebrate skin evolved to be more specialized and complex, especially in land animals.
March 2026 in “Virulence” Vimentin and keratin help viruses spread and could be targets for antiviral treatments.
38 citations
,
October 2011 in “Analytical biochemistry” Hair proteins have weak spots in their α-helical segments.
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.
16 citations
,
January 2017 in “Physical chemistry chemical physics/PCCP. Physical chemistry chemical physics” The 3D structure of a key hair protein was modeled, revealing specific helical structures and stabilization features.
42 citations
,
January 2017 in “Genes” The gene KAP22-1 affects wool yield and fiber shape in sheep.
30 citations
,
March 2019 in “Archives animal breeding/Archiv für Tierzucht” The KRTAP15-1 gene affects cashmere fiber thickness in goats.
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.
2 citations
,
January 2017 in “Folia biologica” The KRTAP7-1 gene is very similar across different cattle and yak breeds and likely plays a role in hair strength and shape.
9 citations
,
April 2019 in “Journal of structural biology” Hair's internal fibers are arranged in a pattern that doesn't let much water in, and treatments like oils and heat change how much water hair can absorb.
January 2019 in “Durham e-Theses (Durham University)” Advanced microscopy shows hair damage and keratin proteins' roles, aiding future cosmetic treatments.