(A) Schematic figure of FLT-4Cre/LacZ LoxP mice. Treatment with tamoxifen activates LacZ expression and enables visualization of lymphatic vessels with B-gal.
(B) High level activation of LacZ expression in LYVE-1 positive lymphatics is inducible with tamoxifen.
(C) Representative high power (40×) images of skin sections double stained for B-galactosidase (blue) and LYVE-1 (brown stain, left panel) or Von-Willebrand Factor (VWF; brown stain, right panel) demonstrate specificity of Lac-Z expression only in lymphatics vessels (blue/brown double arrow on the left). Notice no overlap with VWF (separate brown and blue arrows) on the right panel.