Research Paper Volume 11, Issue 23 pp 11722—11755

Histone proteomics reveals novel post-translational modifications in breast cancer

Figure 7. Analysis of H1 histone tyrosine phosphorylation following LY294002 and Troglitazone treatments in MCF7 cells. (Panel A) (A) 2D TAU Western blot analysis of histone H1 tyrosine phosphorylation level (upper panel) and relative normalization with H1 antibody (lower panel) after treatment of MCF7 with LY294002; All WB images were acquired in 4 seconds. (B) Densitometry analysis of H1 tyrosine phosphorylation spots; (C) Western blot analysis of pAKT, and pFAK (Y576/577) levels in protein extracts from LY294002 treated cells. Phospho-Akt (ser473) and pFAK (Y576/577) signals were normalized to the corresponding total Akt and total FAK, respectively. (Panel B) (D) 2D TAU Western blot analysis of histone H1 tyrosine phosphorylation level (upper panel) and relative normalization with H1 antibody (lower panel) after treatment of MCF7 with Troglitazone; All WB 2D images were acquired in 4 seconds. (E) Densitometry analysis of H1 tyrosine phosphorylation spots; (F) Western blot analysis of pAKT, and pFAK (Y576/577) levels in protein extract from Troglitazone treated cells. Phospho-Akt (ser473) and pFAK (Y576/577) signals were normalized agianst the corresponding total Akt and total FAK respectively. The assays were repeated in three independent biological replicates. Data are expressed as mean ± SEM (N =3).