Strain specific L1CAM expression analysis in homozygous B-hL1CAM mice by flow cytometry. Brain was collected from wild type (WT) mice (+/+) and homozygous B-hL1CAM mice (H/H), and analyzed by flow cytometry with species-specific anti-L1CAM antibody. Mouse L1CAM was detectable in WT mice (+/+). Human L1CAM was exclusively detectable in homozygous B-hL1CAM mice (H/H) but not in WT mice (+/+).