How can i retrieve all cds from a ensembl genetree？

Question

[yumchao]

I have download a genetree from ensembl. The sequence in the fasta is amino acid. And each seq have an ensembl ID, all i want to do is to find the cds of each seq. but there is so many sequeces in the file. how can i download them easily? what kind of tools can i use? the tutor told me that biomaRt maybe work. but it didn't.

[mark.ziemann]

You can download the Ensembl CDS from the Ensembl ftp site (http://www.ensembl.org/info/data/ftp/index.html)