10 Jun For PDB entry 1DXZ, the side chains of the amino acids within the helical
Question
For PDB entry 1DXZ, the side chains of the amino acids within the helical part of the structure are ________.
all aliphatic
mostly charged
mostly nonpolar
mostly polar
Which amino acid is ~1 turn away from Met 243?
Thr 244
Ile 247
Leu 251
Leu 245
Which of the following statements best describes the N- and C-termini of 1DXZ?
Histidine is the N-terminal amino acid, and the C-terminus is modified to be an amide.
The N-terminus is modified to contain an extra carbonyl group, and the C-terminal amino acid is proline.
Proline is the N-terminal amino acid, and the C-terminus has the typical carboxylate functional group.
Proline is the N-terminal amino acid, and the C-terminus is modified to be an amide.
How was the structure of 1DXZ determined, and where in the cell would this segment of the nicotinic acetylcholine receptor alpha subunit be found?
NMR spectroscopy; in the cytosol
NMR spectroscopy; in the cell membrane
X-Ray diffraction; in the cell membrane
Neutron diffraction; in the cell membrane
Dermcidin, 2YMK, is a barrel-like assembly of 6 a helices that has a _______ and ________ interior.
hydrophobic; fully occluded
hydrophobic; hollow
hydrophilic; fully occluded
hydrophilic; hollow
Entry 1A6M is a protein containing ___ a helices that contain at least 10 amino acids, held together by a hydrogen-bonding framework, where the combined helices form a globular structure with a _______ exterior and a ________ interior.
7; hydrophobic; hydrophilic
6; hydrophilic; hydrophobic
6; hydrophobic; hydrophilic
7; hydrophilic; hydrophobic
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