Bugfix of amber14sb force field of gromacs following webpages:
http://zhenglz.blogspot.com/2017/05/fixing-bugs-in-ff14sb-port-for-gromacs.html
Add the following two lines in the ffbonded.itp after the 730th lines:
NA CW CC CT 4 180.00 4.60240 2 ;;; HID force field added
NA CV CC CT 4 180.00 4.60240 2 ;;; HID force field added
The atom type CV and CW here are similar and share the same parameter value.
http://zhenglz.blogspot.com/2017/05/install-new-amberff-ports-in-gromacs.html
Michio Katouda (katouda@rist.or.jp)