How Can I Count Dipeptide In Multiple Protein Sequences ?

Question

[pujapatel5400]

Hello, I have a fasta file which have multiple protein sequences. I want to do find composition of Dipeptide from the multiple protein sequences, but I could not get any scrip or another function in matlab. if possible help me.thank a lot for any help.

[Prakki Rama]

This is using unix but not in matlab. Try

grep -v '>' fileName.fasta | grep -E -o '(.)\1' | wc -l