Which from following is NOT a globular protein?

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Proteins are classified into two types based on their molecular shape: fibrous proteins and globular proteins. Fibrous proteins have a thread-like structure. Examples include keratin (present in hair, wool, silk) and myosin (present in muscles). Globular proteins have a spherical shape. Examples include insulin, egg albumin, and serum albumin. Therefore, keratin is a fibrous protein and not a globular protein. Answer: Keratin