Dear members I assigned the secondary structure to my pdb file by the DSSP application from this webserver http://www.cmbi.ru.nl/dssp.html
The application works and gives output the pdb file. The output file just have the reside list not the atom list. I am not able to view the structure from this pdb file. If someone have experience with this, or there is some other way to assign the secondary structure to the pdb file. best Adriana