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Hair and wool have complex microscopic structures with microfibrils and varying cystine content.

The B2 genes are crucial for hair growth in rats.

As sheep age, their hair fibers and follicles grow larger and more organized, with no significant differences between males and females.

Ziehl-Neelsen's stain helps identify different parts of hair in sheep and goats.

The research identified proteins that change as goat hair follicles begin to form, helping to understand how cashmere grows.

Certain genetic variations in the FST gene are linked to better wool quality in Chinese Merino sheep.

Some hair protein genes evolved early and were adapted for use in hair follicles.

Exosomes help hair follicle development in cashmere goats.

Disabling the FGF5 gene in sheep leads to longer wool.

Trichohyalin, a hair follicle protein, has a part with repeating patterns of 23 amino acids.

Overexpression of FGF5s makes Chinese Merino sheep grow longer and heavier wool.

The study found specific proteins that could mark different growth stages of cashmere goat hair and may help improve cashmere production.

Balding hair follicle cells are smaller, grow less well, and need more effort to culture than non-balding cells.

Variant G of the KRTAP20-1 gene improves wool curliness in Chinese Tan sheep.

Researchers found genes and genetic variants linked to sheep wool and skin wrinkles.

Melatonin treatment increases a specific RNA in goat cells that boosts cashmere growth.

The 190-kbp domain contains all human type I hair keratin genes, showing their organization and evolution.

Prolactin and melatonin can stimulate hair growth in Cashmere goat hair follicles, but melatonin may reduce follicle viability over time.

Goat reproductive activity and coat growth are affected by light and temperature, with temperature altering prolactin levels and hair growth, but not melatonin or estrus onset.

A long-acting Vitamin C derivative helps hair grow by stimulating cells and increasing growth factors.

Ancient Chinese goats evolved cashmere-producing traits due to selective breeding, particularly in genes affecting hair growth.

Researchers created a lab model to study human hair growth, showing it can grow and self-regulate outside the body.

Higher protein diets with DL-methionine improve mink hair growth and fur quality.

Melatonin implants can change the seasonal prolactin levels and hair growth in adult cashmere goats but not in juveniles, and don't delay spring moult for better fiber harvesting.

Prenatally androgenized ewes can model increased hair diameter in women with PCOS.

Different androgen concentrations affect wool-related gene expression differently in Hetian and Karakul sheep breeds.

Wild African goats have genetic adaptations for surviving harsh desert conditions.

Immunizing goats against melatonin can temporarily change their cashmere growth cycles and increase fleece production.

Hair and wool have diverse keratins and keratin-associated proteins.

The document concludes that the human keratin gene cluster is complex, with a need for updated naming to reflect over 50 functional genes important for hair and skin biology.