The third amino acid in the peptidoglycan crosslinking chain is either diaminopimelic acid or lysine because this amino acid must

Biotechnology Engineering (M.Phil./Ph.D.) 2014 Panjab University Entrance Exam With Answers

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A: Be positively charged for a salt bridge to form

B: Be hydrophilic

C: Have a free amino group for peptide bond formation

D: Have a large R-side chain to fill space in the cell wall

The answer is: C

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