system
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 in skin is softer than keratin in nail because keratin in skin has:
assistant
The correct answer is  A i.e. Less number of disulphide bondsKeratin in skin is softer than keratin in nail, horn & hooves because skin keratin has less number of disulfide bondsQ between Cys residues of adjacent polypeptide chains.