==== Secondary Structure Definition by the program DSSP, updated CMBI version by ElmK / April 1,2000 ==== DATE=25-NOV-2009 . REFERENCE W. KABSCH AND C.SANDER, BIOPOLYMERS 22 (1983) 2577-2637 . HEADER HYPOTENSIVE HORMONE 06-APR-94 1ANP . COMPND 2 MOLECULE: ATRIAL NATRIURETIC PEPTIDE; . SOURCE 2 ORGANISM_SCIENTIFIC: HOMO SAPIENS; . AUTHOR W.J.FAIRBROTHER,R.S.MCDOWELL,B.C.CUNNINGHAM .