Dear Users, I have a long list of genes and I would like to retrieve informations about mutations and especially the frequency of each mutation. I searched directly using the COSMIC Biomart on the COSMIC web site but unfortunately frequencies are not associated with each mutation when I export the final matrix. As an alternative, I tried to use biomaRt, but unfortunately "frequency" is not present between the filters/attributes. Is there a way to retrieve this information using biomaRt or is there another specific tool able to do that? Thanks in advance E. -- Eleonora Lusito Computational Biology PhD student Molecular Medicine Program via Ripamonti 435, 20141 Milano, Italy Phone number: +390294375160 e-mail: eleonora.lusito at ieo.eu