Identify a protein present in nails

Step-by-step solution

Keratin is a tough, fibrous structural protein that forms the main structural constituent of hair, feathers, hooves, claws, horns, and nails. Legumelin is a protein found in leguminous plants. Myosin is a motor protein found in muscles that is responsible for muscle contraction. Insulin is a peptide hormone produced by the pancreas that regulates blood sugar levels. Answer: Keratin