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Trichocytic cytokeratins are found in hair, nails, tongue, and thymus cells, showing complex regulation in tissue development.

The Wnt signaling pathways change significantly during chick feather development, especially between days 6 and 14.

A 4kb fragment of the desmocollin 3 promoter targets gene expression to specific skin and hair follicle areas.

Keratin 2e shows a unique pattern in developing fetal skin, different from other keratins.

Porcine and human pilosebaceous units are very similar.

Canine claws have complex structures with different keratin types, similar to hair and nails.

The Celsr1 gene is crucial for normal hair patterning in mice.

Feather patterns are influenced by enhancers and chromatin looping, and the structure of protein complexes important for hair growth has been detailed.

Hair keratins are mainly on macrofibrils in the cortex and in the endocuticle in the cuticle.

The hair defect is due to abnormal inner root sheath keratinization.

The inner root sheath evolved to help hair grow safely through the skin in mammals.

The upper dermal sheath can regenerate hair in rats.

Two mouse mutants have defective hair cuticle cross-linking.

Corneous beta-proteins evolved uniquely in reptiles and birds, forming scales, claws, beaks, and feathers.

Removing Ctip2 in skin cells causes skin inflammation similar to atopic dermatitis.

Each group of hair follicles on the scalp shares one muscle that helps control hair movement.

Frizzled 3 and Frizzled 6 together control the orientation of mouse hair follicles.

The conclusion is that teeth, hair, and claws have similar stem cell niches, which are important for growth and repair, and more research is needed on their regulation and potential markers.

Keratinization in embryos helped vertebrates adapt to land by forming a protective skin barrier.

The epidermis is crucial for hair growth.

Hoxc13 gene is essential for hair, nail, and papilla development.

Different processes create patterns in skin and things like hair and feathers.

Sciellin is a protein that helps form protective layers in skin, hair, and nails.

Skin varies in thickness, color, and features due to complex genetic and cellular processes.

Domestic cat hair varies in thickness and length, with guard hairs being longest and thickest, and all hair types mainly contain keratin.

Hex gene plays a crucial role in starting feather development in chick embryos.