Strain specific analysis of EMP2 gene expression in wild-type C57BL/6 mice and B-hEMP2 mice by RT-PCR. Mouse Emp2 mRNA was detectable only in the lung of wild-type C57BL/6 mice (+/+). Human EMP2 mRNA was detectable only in homozygous B-hEMP2 mice (H/H), but not in wild-type mice.