Lecture 6 - 3D Protein Structure Flashcards
0
Q
β turns involve HOW MANY amino acid residues in a 180° turn connecting segments of anti-parallel β-sheets?
A
4
The first and fourth residues hydrogen bond
1
Q
4 principle elements of secondary structure found in proteins
A
Helices (e.g. α-helix)
Sheets (β-sheet)
Turns
Random coils (unstructured segments)
2
Q
What is usually the third residue in type II β turns?
A
Glycine
3
Q
γ turns involve ______ amino acid residues in a 180° turn and ________ is always the second residue
A
3
Proline
4
Q
In β strands the distance between adjacent residues along the strand is ___________.
A
3.5 Ångstroms (0.35 ηm)
5
Q
The distance between adjacent residues along the helical axis of the α-helix is only _________
A
1.5. Ångstroms
