If the PDF file has the text information (not a rendered image), it is possible to save the file as text from many free readers (Acrobat, Foxit), and there you will have the nucleotide information. Otherwise, is to use Adobe Acrobat to do text detection (OCR) and then save the text. Finally, if sequences is definitely not found anywhere in databases online, old-school solution is (as I got to know and do, 20 years ago, gel-based Sanger DNA sequencing) to ask a friend to read the nucleotides in groups of three or four and you type it in a file. Later one you may compare if the word count is the same as in the file. 

Dear Howard,

Thank you for you answer. I think I will have to choose your third option, trying to make no mistakes!

Hi Noemi, if you have any python experience you can parse the file using PDFminer, then feeding the text to biopython.

Good luck!

Sergio

Dear Noemi,

good to hear from you! I hope you are doing fine again! Cross your fingers I might get a sunflower project funded. For your question, the hard way is to type it in new. I have done that as well. Actually it is not as bad. The other possibility I can offer you, but I have not tried it before, but it should work. I do have Acrobat Professional, so I should be able to copy the sequence out of fthe pdf file and safe it in Word or as txt file for you. Fasta Format means you have to put > before your sequence. This line with the > can be used for sequence Information and will not be read by any programme. The next line will be your sequence.

Best wishes and good luck for your research and you of course as well Thank you very much for all your indorsements!

Renate

 Hi, everyone!

I have been able to convert the sequence in a text archive using the OCR. Thanks a lot for your answers!.

Best regards,

Noemí.

Brilliant discussion 

in google translate, there is a section that also convert PDF to text. in

translate a document, you can convert it to font