reset
load=1PP8

define set1{dna and *.O?'}
define set2{dna and *.OP?}
define set3{dna and nitrogen}

select all
cartoon
wireframe off
cpk off
select protein
color translucent
spin on
pause

restrict dna
cartoon off
wireframe 40
pause

select set1
cpk 150
pause

select set1
cpk off
select set2
cpk 150
pause

select set2
cpk off
select set3
cpk 150
pause