High Quality X-Ray Structures of Proteins Have ________________

Multiple Choice

High quality x-ray structures of proteins have ________________
I. a reliability factor, R, between 0.2 and 0.6. A lower value indicates a more reliable structure.
II. a reliability factor, R, between 2 and 6. A higher value indicates a more reliable structure.
III. a temperature factor B between 30 Ų and 60 Ų. A lower value indicates greater confidence in the data.
IV. a temperature factor B between 3 Ų and 6 Ų. A higher value indicates greater confidence in the data

A) I and II
B) II and III
C) II and IV
D) I and III
E) III and IV