load=1DC1.pdb
select all
cpk off
wireframe 60
pause
restrict dna
define set1 *.o4*
define set2 *.OP?
define set3 *.N? and dna
pause
select set1
cpk 150
color yellow
pause
select set1
cpk off
color cpk
select set2
cpk 150
color green
pause
select set2
cpk off
color cpk
select set3
cpk 150
color blue