==== 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 NUCLEOTIDYLTRANSFERASE 10-DEC-97 1A1D . COMPND 2 MOLECULE: RNA POLYMERASE; . SOURCE 2 ORGANISM_SCIENTIFIC: SACCHAROMYCES CEREVISIAE; . AUTHOR S.KRAPP,G.KELLY,J.REISCHL,R.WEINZIERL,S.MATTHEWS .