IS THIS RIGHT ? Certain amino acids destabilize or prevent formation of alpha-he

Question

IS THIS RIGHT ?

Certain amino acids destabilize or prevent formation of alpha-helices. Which amino acid is more likely to be found in an alpha-helices structure based on its charge and R-group size? Gly Pro A sequence of several Glu A sequence of several Lys E, Ala Mass spectrometry gives information about protein 3-D structure Protein unfolding Secondary structure Primary structure A&B; Which is the more stable beta-sheet: parallel or antiparallel? And what is the best explanation for this? Antiparallel, due to more linear H-bonds and a high concentration of Ala and Gly Parallel, due to alignment of all terminal amino-groups on one side and all carboxyl- groups on the other side e Parallel, due to a high concentration of proline residues, promoting more linear H-bonds Antiparallel, due to a more elongated structure than parallel sheets Antiparallel, because beta-turns can join the strands, an arrangement which is not possible with parallel sheets

Explanation / Answer

Ans 1 e alanine

Methionine, alanine , leucine, glutamate and lysine sre usually found in alpha helix.

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