What is the repeated sequence in the peptide backbone of a protein given that C_α,N and Cₒ represent the a-carbon,the amide nitrogen,and the carbonyl carbon,respectively? A)-C_α- C_o-N B)-N-C_o-C_α- C)-N-C_α-C_o- D)-C_o-C_α-N-

Question

Quizplus · Accepted Answer

The repeated sequence in a peptide backbone is N-Cα-C=O, where N is the amide nitrogen, Cα is the alpha carbon, and C=O is the carbonyl carbon. Thus, the correct sequence is N-C_α-C_O-- where the alpha carbon is followed by the carbonyl carbon, and the amide nitrogen is at the beginning of the sequence. This is only found in choice C.

What Is the Repeated Sequence in the Peptide Backbone of a Protein