How are you finding that they "do not exist"? When I look at the pdb file, they are there.bocahighscienceolypm wrote:They have a link to a PDF that shows how the numbering actually goes (this information should also be on the PDB structure summary page, but I'm currently getting an error when I try to look at this or any other structure summary in the PDB). If you're trying to number your Toober from 148 straight through to 296, you'll run out of Toober; make sure you follow the actual numbering of the file.
Amino acids (for chain B) 310-401 do not exist in the pdb file. Can anyone help?
Try opening the PDB in Jmol (or going to the online prebuild environment, I don't know what you prefer to use) and, before typing anything else, type "restrict *b and 310-401". Chain B – amino acids 310 through 401 – should appear.
If this doesn't work, there are a couple possibilities I've thought of: if you're using standalone Jmol on your computer and have downloaded the PDB file, I suppose it is possible that your download was cut short and you're missing part of the file... in which case you could try re-downloading the file. If you're using the online environment or are using standalone Jmol but are certain that all your downloads were complete, my best guess is that you used a command that caused chain B to be excluded (e.g., "restrict *a") and then afterwards tried to look at chain B. Try "select all", then "backbone" (or any other viewing command, just to get everything visible again), and then "restrict *b and 310-401".