==== Secondary Structure Definition by the program DSSP, updated CMBI version by ElmK / April 1,2000 ==== DATE=6-DEC-2009 . REFERENCE W. KABSCH AND C.SANDER, BIOPOLYMERS 22 (1983) 2577-2637 . HEADER VIRUS 12-DEC-97 1KVP . COMPND 2 MOLECULE: SPV4 CAPSID PROTEIN VP1; . SOURCE 2 ORGANISM_SCIENTIFIC: ENTEROBACTERIA PHAGE PHIX174; . AUTHOR R.MCKENNA .