191 citations
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November 1959 in “Annals of the New York Academy of Sciences” Hair and wool have complex microscopic structures with microfibrils and varying cystine content.
3 citations
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July 2012 in “Sokoto Journal of Veterinary Sciences” As sheep age, their hair fibers and follicles grow larger and more organized, with no significant differences between males and females.
24 citations
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June 2003 in “Journal of Structural Biology” Sheet formation is key to macrofibril structure differences in wool.
116 citations
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January 1957 in “Australian Journal of Agricultural Research” Certain hair follicle traits in Merino sheep may be inherited.
9 citations
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December 2018 in “Journal of Natural Fibers” Magra sheep's wool luster is linked to specific keratin gene expression and protein variations.
3 citations
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December 2021 in “Proteins” Wool fiber curliness is linked to the presence of certain proteins and K38.
95 citations
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March 2009 in “Differentiation” Gene expression in wool follicles changes with growth cycles, offering insights into wool and human hair growth.
20 citations
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January 1995 in “Cells tissues organs” Changing light periods synchronized wool growth cycles in sheep.
15 citations
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January 1999 in “Reproduction Fertility and Development” Merino sheep have fewer wool follicles at birth than before birth.
2 citations
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January 1987 in “PubMed” Woolly hair syndrome is a genetic condition causing frizzy, fragile hair.
January 1994 in “Nihon Chikusan Gakkaiho” Collagen fibrils in mink skin change structure during hair growth, becoming looser and thicker in the active phase.
Tan sheep's unique fur traits are determined during the embryonic stage by specific genes.
18 citations
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January 2015 in “Journal of medical genetics” New genes linked to woolly hair have been found, which could help treat it and change hair texture.
37 citations
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October 2013 in “PLoS ONE” MicroRNAs play a key role in wool growth in Tibetan sheep.
November 2025 in “Veterinary and Animal Science” Camel hair structure, not color, helps camels stay cool in the desert.
34 citations
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August 1966 in “Experimental cell research” Keratin fibrils in hair form and stop growing at specific points in the follicle.
January 2013 in “China Animal Husbandry & Veterinary Medicine” The best method to isolate and culture hair follicle stem cells in fine-wool sheep is a combination of two-step enzymatic digestion and mechanical separation.
5 citations
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January 1988 Only two of the four keratin genes are expressed in wool fibers.
January 2012 in “Heilongjiang xumu shouyi” EGF and KGF affect wool fineness in Gansu alpine Merino sheep.
March 2018 in “Journal of Experimental Biology” Hair curliness is caused by the arrangement and length of two different cell types.
1 citations
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January 1992 in “Bangladesh Journal of Animal Science” Camel skin has typical mammalian layers, with hair follicles, glands, and muscles, varying by body area.
15 citations
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December 1972 in “Journal of Investigative Dermatology” 3 citations
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May 1991 in “Journal of Investigative Dermatology”
6 citations
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February 2016 in “American Journal of Dermatopathology” The boy with woolly hair nevus had thinner hair and abnormal hair follicles, which improved with treatment but worsened when treatment stopped.
4 citations
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January 2005 in “Indian Journal of Animal Research” Goat neck skin has a complex network of collagen, elastic, and reticular fibers.
Researchers found genes in sheep that may affect hair growth and wool quality.
30 citations
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January 1994 in “Micron” Mature hair surfaces are formed by keratinized cells with developed layers, not just modified plasma membranes.
3 citations
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December 2024 in “Journal of Animal Physiology and Animal Nutrition” FGF20 is essential for hair follicle stem cell growth and development in fine-wool sheep.
9 citations
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November 2022 in “Biology” Key genes and pathways influence wool traits in Merino sheep.
25 citations
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October 1962 in “Journal of Ultrastructure Research” The hair follicle structure is more complex than thought, with new findings on protein formation.