37 citations
,
October 2015 in “PeerJ” This study found that shampoo and conditioner do not alter hair's molecular structure, while perming treatments significantly affect keratin and intermediate filament structures due to bond alterations.
107 citations
,
October 2014 in “PeerJ” This study found that while molecular hair structures were nearly identical across individuals, genetic factors seem to influence specific lipid compositions, as seen in identical-patterned hair from parent-child pairs and identical twins, but not fraternal twins.
55 citations
,
January 2013 in “International Journal of Cosmetic Science” In this study, researchers found that higher concentrations of internal lipids in African hair may influence its keratin structure, as observed through various analytical methods.
52 citations
,
April 2012 in “Journal of Investigative Dermatology” This study found that KRTAP2 proteins predominantly express in the hair shaft cortex of humans, interact with hair keratins, and play crucial roles in hair shaft keratinization.
7 citations
,
August 2006 in “Biopolymers” This study demonstrated that human hair shafts can be anatomically separated to obtain intact micron and nano keratin filaments using solvents like performic acid and urea.
71 citations
,
August 2005 in “The journal of investigative dermatology. Symposium proceedings/The Journal of investigative dermatology symposium proceedings” This study revealed that human keratin-associated protein genes are expressed in specific patterns in hair fiber regions and vary in size, with some variations distinct across different populations.
235 citations
,
July 1999 in “Journal of biological chemistry/The Journal of biological chemistry” This study establishes a catalog of human type I hair keratins and identifies their specific roles and expression patterns during hair differentiation and growth in scalp follicles.
36 citations
,
December 1991 in “Journal of Dermatological Science” Human nails contain both skin and hair keratins, each needing different extraction methods.
12 citations
,
January 1934 in “Proceedings of the Royal Society of London Series B Containing Papers of a Biological Character” This study found that the X-ray patterns of stretched mammalian hair (β-keratin) are similar to those of natural silk (fibrion), suggesting a similar elastic mechanism involving reversible intra-molecular transformations.