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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Keratin of skin is softer than keratin in nail because keratin in skin has
assistant
The correct answer is  Keratin in skin is softer than keratin in nail, horns because of lesser disulphide linkages between cysteine residues Ref: Biochemistry by U. Satyanarayana 3rd edition Pgno : 489