==== Secondary Structure Definition by the program DSSP, updated CMBI version by ElmK / April 1,2000 ==== DATE=28-NOV-2009 . REFERENCE W. KABSCH AND C.SANDER, BIOPOLYMERS 22 (1983) 2577-2637 . HEADER PHOTOSYNTHESIS/ELECTRON TRANSPORT 20-JUL-00 1FE1 . COMPND 2 MOLECULE: PROTEIN (PHOTOSYSTEM II: SUBUNIT PSBA); . SOURCE 2 ORGANISM_SCIENTIFIC: SYNECHOCOCCUS ELONGATUS; . AUTHOR A.ZOUNI,H.-T.WITT,J.KERN,P.FROMME,N.KRAUSS,W.SAENGER,P.ORTH .