FIG. 4.

Northern blot analysis of MFR. Each lane contained approximately 2 μg of mRNA from the tissues indicated and 8 μg of total RNA from freshly isolated nonfusing (NF) and fusing (F) alveolar and peritoneal macrophages (Aφ and Pφ). Hybridization was performed with ³²P-labeled PCR-generated mouse brain-based sequence (Table 1) and β-actin probes.