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Cat claws stay sharp by shedding their outer layer through microcracks formed during activities.

CARB is a strong barrier in human hair that prevents dye penetration.

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

Trichilemmal keratinization is a unique process in hair follicles where the outer root sheath turns into keratin without a specific layer.

The hair cuticle is made of tough proteins that protect the hair, but more research is needed to fully understand its structure.

Scaffoldin helps form hard skin structures in chicken embryos.

A new pair of mouse keratins, 65 kD and 48 kD, are found in specific skin areas and are linked to a unique skin differentiation type.

The cornified cell envelope forms a protective barrier in skin and hair, using specific proteins and lipids to maintain effectiveness.

Understanding proteins in skin structures like claws and hair is crucial for future research.

Pili torti hair is fragile due to loose keratin filaments and weak disulfide bonds.

Fatp4 is crucial for healthy skin development and function.

The keratin network in mouse skin changes during cornification and affects the skin's protective barrier.

Mature hair surfaces are formed by keratinized cells with developed layers, not just modified plasma membranes.

Keratin films from human hair can potentially replace human nail plates for drug testing.

Hairless mice have longer hair follicles and abnormal structures during the catagen phase.

The enzyme DHHC13 is essential for healthy hair and skin, and its deficiency leads to hair loss and skin problems.

Lack of Ctip2 in skin cells delays wound healing and disrupts hair follicle stem cell markers in mice.

Keratinous tissues have multiple structural layers, including ordered keratin and lipid granules.

Keratins in Malayan pangolins vary by region, suggesting scales evolved from the tail towards the head.

Feathers become harder as they develop due to a change in keratin type.

The 4C32 gene may help in mouse skin development and differentiation.

The southern elephant seal's skin layer helps waterproof the skin by being tightly connected to hair shafts.

Reptile skin hardens by layering beta-proteins on keratin.

CDP is crucial for lung and hair follicle cell development.

pCLCA2 protein may help maintain skin structure and function.

The keratin tail is crucial for skin structure and function.