==== Secondary Structure Definition by the program DSSP, updated CMBI version by ElmK / April 1,2000 ==== DATE=13-DEC-2009 . REFERENCE W. KABSCH AND C.SANDER, BIOPOLYMERS 22 (1983) 2577-2637 . HEADER THYMIDINE PHOSPHORYLASE 14-JUN-90 1TPT . COMPND 2 MOLECULE: THYMIDINE PHOSPHORYLASE; . SOURCE 2 ORGANISM_SCIENTIFIC: ESCHERICHIA COLI; . AUTHOR M.R.WALTER,W.J.COOK,L.B.COLE,S.A.SHORT,G.W.KOSZALKA, .