Hi,

I was trying to restrain the N-CA-C angle to 110.0

I updated the .def file as follows:

angle {

action = *add

atom_selection_1 = name N

atom_selection_2 = name CA

atom_selection_3 = name C

angle_ideal = 110.0

sigma = 2

I got the following:

Sorry: More than one atom selected: "name N"

Number of selected atoms: 86

I tried using N in quotes and it doesn't work either but the example in the website had this(below), what am I doing wrong?

resname ALA and (name ca or name c or name n or name o)

Thank you