The trichohyalin gene is located at chromosomal region 1q21 with other skin-related protein genes.
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November 2009 in “American journal of human genetics” Common variants in the Trichohyalin gene are linked to straight hair in Europeans.
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December 2022 in “Frontiers in Bioscience-Landmark” The role of certain genes in skin cell development may be linked to psoriasis, but the connection is unclear.
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April 2005 in “Journal of Investigative Dermatology” Repetin is a protein involved in skin and hair development, binding calcium and compensating for other proteins when needed.