==== Secondary Structure Definition by the program DSSP, updated CMBI version by ElmK / April 1,2000 ==== DATE=20-DEC-2009 . REFERENCE W. KABSCH AND C.SANDER, BIOPOLYMERS 22 (1983) 2577-2637 . HEADER HYDROLASE 02-SEP-94 1XYS . COMPND 2 MOLECULE: XYLANASE A; . SOURCE 2 ORGANISM_SCIENTIFIC: CELLVIBRIO JAPONICUS; . AUTHOR G.W.HARRIS,J.A.JENKINS,I.CONNERTON,R.W.PICKERSGILL .