User:Eric Martz/Ramachandran Principle Quiz
From Proteopedia
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||The phi bond is between N and C<sub>α</sub>. The psi bond is between C<sub>α</sub> and the carbonyl carbon. | ||The phi bond is between N and C<sub>α</sub>. The psi bond is between C<sub>α</sub> and the carbonyl carbon. | ||
| + | |||
| + | {How many bonded atoms are required to constitute a | ||
| + | [http://biomodel.uah.es/model5/prot/diedros_en.htm dihedral (torsion) angle], such as phi or psi? | ||
| + | |type="[]"} | ||
| + | - None | ||
| + | - 1 | ||
| + | - 2 | ||
| + | - 3 | ||
| + | + 4 | ||
| + | - 5 | ||
| + | ||The phi angle is defined by (1) the carboxy carbon from the previous amino acid; (2) N in the amino acid containing the phi bond; (3) C<sub>α</sub> in the amino acid containing the phi bond; and (4) the carboxy carbon of the amino acid containing the phi bond. | ||
{The number of phi and psi angles in an isolated amino acid (not in a polypeptide chain) is: | {The number of phi and psi angles in an isolated amino acid (not in a polypeptide chain) is: | ||
