Vimentin in human teratoma ( positive) in mouse subcutaneous tissue ( negative): FFPWS using Amersham’s /Calbiochem’s 1F01 ( V9 clone). July 7, 2014 Carl Hobbs Kings College London V9 does not work on FFPWS of mouse tissues, in my XP. Strangely, to me, it works well in rat, under identical conditions.