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What type of bonding helps in stabilisin...

What type of bonding helps in stabilising the a-helix structure of proteins?

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The `alpha-`helix structure of protein is stabilised by intramolecular `H-`bonding between the `(C=O)` group of one amino acid residue and the `(N-H)` group of the fourth amino acid residue in the chain
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CENGAGE CHEMISTRY ENGLISH-BIOMOLECULES-Exercises (Concept Application)
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  17. What is the difference between a nucleoside and a nucleotide?

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