developmental stage:At a late stage of fiber differentiation.,function:In the hair cortex, hair keratin intermediate filaments are embedded in an interfilamentous matrix, consisting of hair keratin-associated protein (KRTAP), which are essential for the formation of a rigid and resistant hair shaft through their extensive disulfide bond cross-linking with abundant cysteine residues of hair keratins. The matrix proteins include the high-sulfur and high-glycine-tyrosine keratins.,similarity:Belongs to the KRTAP type 5 family.,subunit:Interacts with hair keratins.,tissue specificity:Restricted to hair root, not detected in any other tissues. Expressed in cuticle layers of differentiating hair follicles.,
keratin filament,
Restricted to hair root, not detected in any other tissues. Expressed in cuticle layers of differentiating hair follicles.
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