CHARMM>    set 2  500     ! step increment (no. of minimization sd  steps each pass)
 CHARMM>    minimize sd nstep @2 nprint @6 -
 CHARMM>    minimize sd nstep @2 nprint @6 -
 CHARMM>    minimize sd nstep @2 nprint @6 -
 CHARMM>    minimize sd nstep @2 nprint @6 -
 CHARMM>    minimize sd nstep @2 nprint @6 -
 CHARMM>    minimize sd nstep @2 nprint @6 -
 CHARMM>    minimize sd nstep @2 nprint @6 -
 CHARMM>    minimize sd nstep @2 nprint @6 -
 CHARMM>    minimize sd nstep @2 nprint @6 -
 CHARMM>    minimize sd nstep @2 nprint @6 -
 CHARMM>    minimize sd nstep @2 nprint @6 -
 CHARMM>    minimize sd nstep @2 nprint @6 -
 CHARMM>    minimize sd nstep @2 nprint @6 -
 CHARMM>    minimize sd nstep @2 nprint @6 -
 CHARMM>    minimize sd nstep @2 nprint @6 -
 CHARMM>    minimize sd nstep @2 nprint @6 -
 CHARMM>    minimize sd nstep @2 nprint @6 -
 CHARMM>    minimize sd nstep @2 nprint @6 -
 CHARMM>    minimize sd nstep @2 nprint @6 -
 CHARMM>    minimize sd nstep @2 nprint @6 -