'hide sidechain' should not hide CA atoms

[Tristan Croll]

Not much more to say, really - at the moment this command leaves the backbone trace broken up into fragments. To get the expected result one needs to type hide sidechain&~@CA.

[Tom Goddard]

I believe Eric added the "sidechain" selector.

[Eric Pettersen]

After much discussion it was decided to keep CA in the sidechain selector so that "show sidechain" would include the CA-CB bond to the ribbon backbone. The selector "sideonly" does what you want: hide sideonly

--Eric

[Elaine Meng]

Technically this isn’t a bug, although I can see why it’s confusing.  There is “sidechain” including CA and “sideonly” without it.  The problem is that we felt we needed to add CA to “sidechain” because otherwise “show sidechain” shows CB onward floating in space.  Reciprocally, one way or the other is going to be problematic if “sidechain” always means the same thing, and since the ribbon display is often the default, we thought showing sidechain would be more often used.

Short answer is that we’re hoping “hide sideonly” will suffice for this purpose.
Elaine