Dear Sandeep

You can do this easily in Bioedit. Open the fasta file containing the protein sequences in Bioedit. Select Edit, Search, Find /Replace in Titles and type " OS=Helicobacter pylori OX=210 GN=BB464_03095 PE=4 SV=1" and leave the replace section empty. Now you can replace the above words with nothing in all sequences by clicking Replace all button.

Sincerely

K.ULAGANATHAN

Hi Sandeep

you can try this command on a command line

sed 's/OS\=Helicobacter pylori OX\=210 GN\=BB464_03095 PE\=4 SV\=1//g' INPUT.FILE > OUTPUT.FILE

Just change INPUT and OUTPUT with the names of the files you want to read and write. It should work.

Kind regards

Riccardo

Bioinformatics data analyst at www.sequentiabiotech.com

If you just want to remove the thing mentioned in question, it could easily be done in any text editor (provided it is same for all fasta headers).

Try Notepad++, or Atom for windows systems. Command line is always the best option, but limited on the knowledge of the user.