COLLapse <collapse-statement> END <COLLapse-statement>:== SCALe <real> | sets the force constant scaling factor | for all assignments (default 1.0) ASSIgn <sel><real><real> | selects the atoms which are | to be used to determine Rgyr (default: no atoms | selected) and sets the force const and target Rgyr PRINt | print collapse energy info RESEt | erases all collapse assignments