how to convert a protein sequence containing fasta file into DNA sequence containing file?

Question

[sansritisinha]

I have a protein file containing protein sequences, all homologs of each other from different species. I want to convert all the sequences into a fasta file containing respective DNA sequences. Web based tools convert only one sequence at a time. Is there a way to convert all of them at once?

Answer 1

[Pierre Lindenbaum]

Emboss backtranseq reads a protein sequence and writes the nucleic acid sequence it is most likely to have come from.