2hac helix. The B key-frame made by hand in Avogadro.
Exit/Enter WebXR to change view mode.
Tested on Oculus Go (with touchpad). Click trigger button to change control modes.
For tests on a desktop (Windows 10 + Chrome) the "inline" webxr session and
A,S,D,W,↑,↓ keys for navigation are used.
MiniMol WebXR viewerupdated 20 June 2020