Thy1.1 expression analysis in homozygous B-Thy1.1 mice by flow cytometry. Splenocytes, blood and thymocytes were collected from wild-type C57BL/6 mice (+/+) and homozygous B-Thy1.1 mice (Mut/Mut), and then analyzed by flow cytometry with anti-Thy1.1 and anti-Thy1.2 antibodies. Thy1.2 was detectable in C57BL/6 mice. Thy1.1 were only detectable in B-Thy1.1 mice but not in wild-type mice.