Map sapling earning The carbon-nitrogen peptide bond is rigid, but rotation can

Question

Map sapling earning The carbon-nitrogen peptide bond is rigid, but rotation can take place about the N and the Co C bonds in a protein (Ca is the a carbon atom). These bond angles define the conformation of the peptide chain. Answer questions (a) and (b). A Ramachandran plot is given for reference. a) Which of the following most likely describes part of 180 an observed a helix? 120 O p +600, +40°, many Gly residues O op 570, 470, many Pro residues 60 O 590, J +1500, many Ser residues O 600, y 470, many Ala residues O p 1400, up +1300, many Val residues 60 120 b) Which of the following would not likely occur in a B sheet? 180 Choose all that apply 180 180 do (degrees) 510, y +1530; many Gly and Pro residues p +60°, +60°, many Gly residues p 1390, y J +135°, many Val residues p 1200, y +120°, many Tyr residues V p 57% up 49%, many Ala residues Previous ® Give Up & View Solution Check Answer Next Exit B Hint

Explanation / Answer

A- answer 4. Ala residue

B- answer 2 and 5 wont occur in beta sheets

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