Figure 4

Tissue-specific ratios of Tnfrh1 to Tnfrh2 expression. cDNAs were amplified using upstream primers specific for the divergent first exons of either Tnfrh1 or Tnfrh2 (Fig.1, primers 1 and 5), with a shared downstream primer (Fig.1, primer 4). The predicted sizes for the PCR products derived from each gene are indicated. Several organs and tissues, including whole placentas at 12.5 and 14.5 dpc (asterisks), show preferential expression of Tnfrh1.