please explain and show why. Sapling Learning - amino acid,-amino acid the first
ID: 716031 • Letter: P
Question
please explain and show why.
Sapling Learning - amino acid,-amino acid the first (1st) residue? Choose the correct residue from the A small generic section of the primary structure of an u ho ix is given below 2-amino acids-amino acid-amino acids-amino acide-amino acidy - (a) Which amino acid residue's back bone forms a hydrogen bond with the backbone of amino acid Select answer (b) Which of the following peptide segments is most likely to be part of a stable a helix at physiological pH? O -Glu-Glu-Glu-Glu-Glu- O -Pro-Leu-Thr-Pro-Trp- O -Gly-Arg-Lys-His-Gly- O -Lys-Lys-Ala-Arg-Ser- O -Glu-Leu-Ala-Lys-Phe- OGly-Gly-Gly-Ala-Gly- O-Tyr-Trp-Phe-Val-lle-Explanation / Answer
a) amino acid-5 residues backbone will form the hydrogen bond with 1st residue's backbone.
b) -Glu-Leu-Ala-Lys-Phe-
sequentially negatively and positively charged residues repel each other. positively charged residues are usually 3 AA acids away from negatively charged residues as well as aromatic AA Proline and Glycine do not like to form alpha helices because proline is bulky and glycine is too flexible.