While laminin (TRITC) was colocalized with endomucin (FITC) in a large fraction of PyMT1 tumor vessels (SI Appendix, Fig. S5C), it was severely impaired in GPx2 KD tumors, with fewer vessels staining for both markers (SI Appendix, Fig. S5 C and D). The gene discussed is GPX2; the disease is neoplasm.