Hi Elaine,

I hope this email finds you well. May I ask how to measure the angle between two domains from one molecule or two different molecules in ChimeraX. Here are some examples below.

Example 1:

How to calculate these angles (54°, 38°)？

Example 2:

How to calculate this angle (75°) ?

Example 3:

How can I measure the rotation angle between A and B, or between two specific regions of these two molecules in ChimeraX?
If I need to calculate the rotation angles of two molecules relative to a specific molecule, how can I define a shared axis for calculating the rotation angles? The rotation axes are different when I use the command “measure rotation A toModel B” to calculate the rotation angles, which is not an ideal way to compare them in parallel.

Thank you in advance for your any suggestions.

Very appreciated,

Junjie