==== Secondary Structure Definition by the program DSSP, updated CMBI version by ElmK / April 1,2000 ==== DATE=26-NOV-2009 . REFERENCE W. KABSCH AND C.SANDER, BIOPOLYMERS 22 (1983) 2577-2637 . HEADER ELECTRON TRANSPORT 26-AUG-91 1C53 . COMPND 2 MOLECULE: CYTOCHROME C553; . SOURCE 2 ORGANISM_SCIENTIFIC: DESULFOVIBRIO VULGARIS STR. 'MIYAZAKI . AUTHOR A.NAKAGAWA,Y.HIGUCHI,N.YASUOKA,Y.KATSUBE,T.YAGA .