==== Secondary Structure Definition by the program DSSP, updated CMBI version by ElmK / April 1,2000 ==== DATE=5-DEC-2009 . REFERENCE W. KABSCH AND C.SANDER, BIOPOLYMERS 22 (1983) 2577-2637 . HEADER IMMUNE SYSTEM 17-AUG-01 1JSK . COMPND 2 MOLECULE: NKG2-D; . SOURCE 2 ORGANISM_SCIENTIFIC: MUS MUSCULUS; . AUTHOR P.LI,R.K.STRONG .