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The gene Foxq1, controlled by Hoxc13, is crucial for hair follicle differentiation.

Type II keratin genes are crucial for hair follicle differentiation and have a conserved structure and expression pattern.

Arginine converts to citrulline in hair follicles as proteins harden.

Infrared and Raman imaging can non-destructively analyze hair structure and help diagnose hair conditions.

Hair has unevenly distributed proteins and lipids, with lipids mainly in the cuticle and proteins in the cortex and medulla.

Two specific genes are more active during hair growth in mice.

Guinea-pig hair and follicle proteins are mostly similar, but follicles have more group 2 proteins and fewer group 3 and 4 proteins.

Hair is mostly made of three protein types: helical, high-sulfur, and high-tyrosine.

Chemical treatments and daily stresses damage hair, especially the cuticle layer.

Hair follicle cells become four types: medulla, cortex, cuticle, and inner root sheath.

Bubble hair deformity may be caused by hair shaft trauma and can improve with gentle hair care.

Alopecic hair has more irregular structures and chemical changes than normal hair, reducing its strength.

White hair has less lipid content and absorbs water differently than brown hair.

Hair proteins change location and structure as hair cells mature.

Stretching damages Caucasian hair's structure more easily than Asian hair.

Different S100 proteins have specific roles in various parts of the hair follicle.

The evolution of mammal body hair remains a mystery.

Lipids are crucial for healthy hair, protecting it from damage and breakage.

Pubic hair is thicker than axillary and scalp hair, useful for forensic identification.

Calcium soaps are present in human hair and can be removed with acid.

Hair follicles and sweat glands show different keratin staining patterns.

Oxidative hair dye changes hair color and structure but doesn't weaken it.

A more sensitive assay was developed to detect enzyme activity converting arginine to citrulline in hair follicles.

X-ray microscopy can non-invasively show hair structure changes after treatments, but it's less detailed than TEM and needs improvement.

Older thin hair is not just thinner but also has different shape, structure, and stiffness.

Heating human hair creates hollow microtubes with smooth surfaces.

Trichohyalin and peptidylarginine deiminase type III are found together in rat hair follicles, with trichohyalin being modified after expression.

Hair analysis can detect drug use but is costly and interpretation is complex.

A new method effectively stains hair samples for study without losing hair sections.

Straight permed hair loses weight faster than virgin hair when heated, but ends up heavier after burning.