The Biologist we work with has brought my attention to some misalignment between Ensembl and RefSeq with regard to the length and position of 3UTR sequences. I have been querying Ensembl many times through biomaRt . I wonder whether I can reach RefSeq data through biomaRt or any other Biconductor package. Unfortunately, I cannot find RefSeq in the list of databases obtained through function listMarts() Thank you so much, Maura tutti i telefonini TIM! [[alternative HTML version deleted]]