IHC staining of original tumours and xenograft tumours.

Sections are from the following mouse passage: PpaX1 p4, PpaX2 p1, PpaX6 p7, PpaX8 p2. % Positive cells are given according to the following system: 1 = 1–10%, 2 = 11–40%, 3 = 41–80%, and 4≥80%, and the staining intensities are given in brackets where (1 = weak, 2 = medium and 3 = strong). 1: Only cells with nuclear Snail+Slug expression is counted.