Fig. 1
From: Significance of sphingosine kinase 1 expression in feline mammary tumors
Immunohistochemical staining of SPHK1 was carried out in FMT TMA tissues. a-c Low SPHK1 expression in normal mammary tissues. d-f Low SPHK1 expression in FMT. g-i Upregulated SPHK1 expression in FMT. j-l Negative control (rabbit antibody against SPHK1 was omitted, but normal rabbit IgG was applied). m-o Positive control (xenografted human breast cancer MCF-7 cells)