==== Secondary Structure Definition by the program DSSP, updated CMBI version by ElmK / April 1,2000 ==== DATE=24-NOV-2009 . REFERENCE W. KABSCH AND C.SANDER, BIOPOLYMERS 22 (1983) 2577-2637 . HEADER OXIDOREDUCTASE 03-SEP-92 1ABN . COMPND 2 MOLECULE: ALDOSE REDUCTASE; . SOURCE 2 ORGANISM_SCIENTIFIC: HOMO SAPIENS; . AUTHOR D.W.BORHANI,T.M.HARTER,J.M.PETRASH .