Mapping gene coordinates to transcript exons

Question

[Volka]

Hi all, I currently have file A, which contains 250 target genes and their positions (ch3:178916681-chr3:178916741). I have another file with the list of RefSeq transcript IDs used for these target genes. How can I go about getting the exon positions of these target genes?

[Hamid Ghaedi]

both biomaRt and UCSC Table browser can help you with that