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January 1981 High temperatures and certain chemicals can significantly change the amino acid content in human hair.
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June 2023 in “Journal of applied crystallography” The technique showed that human hair has two main parts, with 68% being rigid and the rest flexible, and water swelling affects its structure.
As people age, certain enzymes in scalp glands decrease, affecting hair health.
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January 1993 in “Journal of Investigative Dermatology”
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December 2020 in “bioRxiv (Cold Spring Harbor Laboratory)” The SYP123-VAMP727 complex is important for transporting materials that harden the root hair shank in Arabidopsis.
January 2000 in “Zhongguo yixue wulixue zazhi” Different human hair keratin types have unique structures that affect how they dissolve and can be used to create self-tendons.
97 citations
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March 2006 in “Journal of Investigative Dermatology” Mutations in the DSG4 gene cause a severe form of brittle hair and skin issues.
February 2020 in “Oxford University Press eBooks” The alpha-helix was confirmed as a key structure in proteins.
48 citations
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November 2002 in “Journal of biological chemistry/The Journal of biological chemistry” Genetic variations in hair keratin proteins exist but don't significantly affect hair structure.
September 2025 in “SKINdeep” Sebaceous glands help protect and maintain healthy skin and hair.
103 citations
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February 1972 in “Proceedings of the National Academy of Sciences” A unique enzyme in guinea pig hair follicles helps form protein cross-links in hair.
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January 1995 in “European Journal of Neuroscience” Glycine is a key transmitter in rat spinal cord synapses, often alongside GABA.
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April 2025 in “Pharmaceuticals” APA is a promising new compound for repairing damaged hair, outperforming Olaplex® in strength and elasticity.
March 2003 in “中華皮膚科醫學雜誌” Trichothiodystrophy causes unusual hair and developmental issues.
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November 2016 in “The Journal of Dermatology” Pili torti hair is fragile due to loose keratin filaments and weak disulfide bonds.
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July 2017 in “Biopolymers” Recombinant keratins can form useful structures for medical applications, overcoming natural keratin limitations.
September 2023 in “Biomedicines” Squalene may be a marker for certain types of alopecia.
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April 2016 in “Experimental Dermatology” Chemical treatments like dyeing, perming, and bleaching damage hair by altering amino acids and lipids.
51 citations
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January 2007 in “Animal Genetics” The gene for slick hair in Senepol cattle is located on chromosome 20 and may involve the SRD5A2 gene.
Chirality influences the structure, strength, and biological uses of peptide-based hydrogels.
September 2016 in “Journal of Dermatological Science” Both SMS1 and SMS2 are crucial for normal hair growth and cycle in mice.
91 citations
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May 1972 in “Journal of Biological Chemistry” Transglutaminases work through a ping-pong mechanism, and human plasma and platelet transglutaminases have similar catalytic subunits.
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December 1973 in “Biochemical Journal” Guinea-pig hair and follicle proteins are mostly similar, but follicles have more group 2 proteins and fewer group 3 and 4 proteins.
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December 1999 in “Journal of Investigative Dermatology” Mutations in the hHb6 gene cause the hair disorder monilethrix.
April 2026 in “Frontiers in Cell and Developmental Biology” Hair follicles in mice help detect and respond to germs.