==== Secondary Structure Definition by the program DSSP, updated CMBI version by ElmK / April 1,2000 ==== DATE=10-DEC-2009 . REFERENCE W. KABSCH AND C.SANDER, BIOPOLYMERS 22 (1983) 2577-2637 . HEADER ISOMERASE(INTRAMOLECULAR ALDOSE/KETOSE) 01-AUG-77 1PGI . COMPND 2 MOLECULE: D-GLUCOSE 6-PHOSPHATE ISOMERASE; . SOURCE 2 ORGANISM_SCIENTIFIC: SUS SCROFA; . AUTHOR H.MUIRHEAD .