What is the disulfide bond?(a) The ionic bond between S-S(b) Vander Waals interaction between two S atoms(c) The covalent bond between sulfur atoms on two cysteine amino acids(d) The covalent bond between any two sulfur atomsThe question was posed to me during an interview.The origin of the question is Biopharmaceuticals topic in portion Biopharmaceuticals of Drug Biotechnology

What is the disulfide bond?(a) The ionic bond between S-S(b) Vander Wa

1.	What is the disulfide bond?(a) The ionic bond between S-S(b) Vander Waals interaction between two S atoms(c) The covalent bond between sulfur atoms on two cysteine amino acids(d) The covalent bond between any two sulfur atomsThe question was posed to me during an interview.The origin of the question is Biopharmaceuticals topic in portion Biopharmaceuticals of Drug Biotechnology
Answer» Right answer is (c) The covalent bond between sulfur atoms on TWO cysteine amino acids Best explanation: Covalent bond between sulfur atoms on two cysteine amino acids. Two cysteine amino acids atoms in close proximity will come together and then FORM a covalent bond in between with the release of a water molecule. The bond formed is covalent bond RATHER than IONIC, Vander WAALS or non-ionic.

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