I was wondering if there is a possibility to filter DNA sequences of defined length (lets say about 30 bp) forthe presence of a specific base at a defined positin.
Something like: Give me only the sequences which contain a G at position 5 and an A at position 20.
Maybe this tool is so trivial that it was never implemented in galaxy or I am not seraching with the right key words.
does anybody have an idea?
Thank you very much,