reset                        
load=2STW
define set1 *.O?' and dna
define set2 *.OP? and dna
define set3 *.N? and dna

cpk off
wireframe off
cartoon
select protein
cartoon
color translucent 0.7
echo "2STW. Protein with DNA"
pause

display dna
center selected
cartoon off
wireframe 60
echo "DNA"
pause

select set1
cpk 170
echo "Oxygen atoms of deoxyribose"
pause

cpk off
select set2
cpk 170
echo "Oxygen atoms of phosphate"
pause

cpk off
select set3
cpk 170
echo "Nitrogen atoms of nucleobases" 
pause