load =1mhd

color background White

define set1 *.O?' and dna
define set2 *.OP?
define set3 *.N? and dna

cpk off
wireframe off
cartoon on
echo 1mhd entire structure
pause

restrict dna
center selected
cartoon off
cpk off
wireframe 20
echo DNA
pause

select set1
cpk on
cpk 150
echo 2-deoxyribose oxygen
pause

cpk off
select set2
cpk on
cpk 150
echo phosphate oxygen
pause

cpk off
select set3
cpk on
cpk 150
echo nucleobases nitrogen
pause