Yes, chickens have keratin. Keratin is a key protein constituent of many chicken structures.
Keratin's Role in Chickens
Keratin is a fibrous structural protein found in various parts of a chicken's body, playing crucial roles in its physical structure and protection.
- Feathers: Chicken feathers are predominantly composed of keratin, with over 90% being this protein according to Professor Raffaele Mezzenga of ETH Zurich. [11-Dec-2023] The structure and properties of feathers, including the frizzle feather trait, are directly linked to specific keratin types, such as α-keratin (KRT75). https://pubmed.ncbi.nlm.nih.gov/22829773/ https://journals.plos.org/plosgenetics/article?id=10.1371/journal.pgen.1002748 https://pmc.ncbi.nlm.nih.gov/articles/PMC3400578/
- Beak: The rhamphotheca, a keratin sheath covering the beak, is another example. Damage to this keratin structure can be a concern. https://www.backyardchickens.com/threads/rhamphotheca-keratin-sheath-on-beak-broken-off.1273287/
- Scales: Chickens possess scales on their legs and feet. These also contain keratin, though the exact composition might vary slightly.
Research has explored keratin extraction from chicken feather waste, highlighting its abundance in this byproduct. https://www.sciencedirect.com/science/article/abs/pii/S135951131831849X Studies also indicate that both α- and β-keratins are present in developing chicken feathers, providing insights into their evolution and structural development. https://pmc.ncbi.nlm.nih.gov/articles/PMC4679038/
