We determined the expression of RasGRP3 in six different human breast ductal adenocarcinoma derived cell lines, namely in BT-474, MDA-MB-453, MCF7, SK-BR-3, T-47D and JIMT-1 cells (the characteristics of the cell lines and relevant references are shown in Additional file 1: Table S1). Here, RASGRP3 is linked to breast ductal adenocarcinoma.