Hi Bala,<br><br>The program areaimol in the ccp4 package will do just that (i.e. generate a pdb file with the sasa value in the b-factor column).<br><br>&nbsp; Cheers,<br><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Boaz<br><BR><BR>Boaz Shaanan, Ph.D.<br>Dept. of Life Sciences<br>Ben-Gurion University of the Negev<br>Beer-Sheva 84105<br>Israel<br>Phone: 972-8-647-2220 ; Fax: 646-1710<br>Skype: boaz.shaanan</BR></BR>‎