I have 2 molecular tunnels inside one protein corresponding to two starting points, created by the CAVER plugin. The two tunnels join to form one common tunnel.
I want to measure
1) The distance between the two starting points of the tunnels
2) The distance from each starting point to the junction
If I follow wizard --> measurements --> distance it asks for atoms to click on, but as the tunnels are empty space when I click on the starting points of the tunnels nothing is recognized.
What would be the most accurate way of measuring the above two distances?