FGFR1 and breast carcinoma: Nuclear accumulation of FGFR1 was detected using monoclonal N-terminal FGFR1 Ab from Abcam (Fig. 1A, B) as well the polyclonal C-terminal FGFR1 Ab from Santa Cruz (Fig. S1A, supplementary material) and the N-terminal FGFR1mcAB6 (Fig. S1B,C supplementary material), giving further support to the observations of nuclear accumulation of full length FGFR1 [2].Importantly, the nuclear accumulation of truncated FGFR1 (approximately 50 kDa) was demonstrated in breast cancer cells [43].