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The conclusion is that substances can penetrate hair fibers through multiple pathways, including both the cell membrane complex and the non-keratinous parts.

The B2 genes are crucial for hair growth in rats.

The study found that minor protein differences between curved and straight Japanese hair are unlikely to significantly affect hair structure.

Researchers found genes for cysteine-rich proteins that form the protective layer of hair in humans and sheep.

Feed restriction in sheep leads to finer wool fibers but may reduce wool quality.

Hair growth is controlled by specific gene clusters and proteins, and cysteine affects hair gene expression in sheep.

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

The research shows that a gene called Wnt3 affects hair growth and structure, causing short hair and balding when overactive.

Understanding wool keratin-associated proteins in sheep can help improve wool quality through selective breeding.

Sheep and goat hair fibers are complex due to keratin-associated proteins, which are important for fiber properties and growth.

Human hair keratin genes are similar to mouse genes and are specifically expressed in hair follicles.

Lab-grown nail cells show characteristics similar to natural nail and hair.

Understanding hair biology is key to developing better treatments for hair and scalp issues.

Human hair protein extracts can protect skin cells from oxidative stress.

Frequent hair coloring and styling can damage hair and cause breakage or loss.

Hair dyes can change hair color temporarily or permanently but may cause side effects like skin reactions and hair damage.

Certain gene mutations are linked to wool quality in sheep and could help in breeding for better wool.

Genetic variation in the KRTAP15-1 gene affects wool yield in sheep.

The PCR technique can identify genetic differences in a wool-related gene among different sheep breeds, which may help improve wool and pelt quality.

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

The 3D structure of a key hair protein was modeled, revealing specific helical structures and stabilization features.

Biotin helps regulate proteins in the blood, which may explain its role in hair growth.

Keratin proteins are crucial for hair growth and structure.

The article concludes that the wool follicle is a valuable model for studying tissue interactions and has potential for genetic improvements in wool production.

Understanding normal hair growth and loss in children is key to diagnosing and treating hair disorders.

Hair cystine levels may indicate protein malnutrition, but more research is needed.

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

The supplement helps improve hair growth and reduce hair shedding.

Nutrients like vitamins, copper, zinc, and amino acids are crucial for healthy hair and wool growth.

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