I am interested in a structure 1GSG deposited in 1990. The PDB index for this file shows the enzyme Gln tRNA synthetase with the usual ribbon structure, bound to tRNA(Gln). When I fetch 1GSG using either the PDB file number only, or that file number input into PDB biounit, the structure that comes up does not have the helical or β-sheet secondary structures shown as ribbons. Rather the entire protein backbone is shown without any secondary structure definition. One can see the helical segments in the worm like structure, but not in the form of the usual helical secondary structure. How can I retrieve a structure that is similar to that in the PDB index list. I have enclosed the following: [cid:image001.png@01D31C42.7C7B48F0] This is what comes up when I fetch the PDB file. [cid:image002.png@01D31C42.7C7B48F0] Thanks Arthur G. Szabo Professor Emeritus
