Retrieving "Beta Keratin" from the archives

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1. Feathers

   Linked via "beta-keratin"

   Feathers (avian integument)?) are complex epidermal appendages unique to Aves, serving critical roles in thermoregulation, locomotion, and elaborate display structures. Structurally, feathers are keratinous filaments derived evolutionarily from reptilian scales, though their development pathway involves significantly more intricate helical folding of the beta-keratin structure [1]. Modern ornithologica…